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cressidagrey · 2 months ago

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Lessons in Math (and Humility)

Welcome to Mysterious Mrs Piastri's Mondays. Apparently this is a thing now. (Ever since I hear that interview where Kimi was asked which subjects he's scared off an the answer was Math, I knew I was gonna write this.)

Pairing: Oscar Piastri x Felicity Leong-Piastri (Original Character)

Summary: Kimi Antonelli thought he could handle anything — race cars, pressure, a wet track…but his math homework may destroy him. Enter Bee Piastri.

(divider thanks to @saradika-graphics )

Kimi Antonelli didn’t ask for help lightly.

Especially not with math.

He was a racing driver, not an idiot. He could handle telemetry, fuel loads, braking calculations, tyre degradation graphs — all of it — without blinking. He’d memorized braking points at Spa, figured out fuel maps on the fly, and survived radio calls with engineers who thought “you’re fine” covered every possible scenario.

He was good at numbers. At racing numbers.

But this assignment?

This nightmare of partial derivatives and matrix transformations?

It stared at him from his tablet like a personal attack, every line of notation a new insult to his intelligence.

After twenty minutes of glaring at it — tapping his pen, checking his notes, checking them again as if they might have magically rewritten themselves — Kimi finally let out a groan of pure, unfiltered despair.

He flopped face-first onto the hospitality couch, tablet slipping from his hands onto the seat beside him.

Without lifting his head, he announced, voice muffled against the cushions: “I’m going to fail math and bring shame to the entire grid.”

The nearest breathing human — unfortunately — was Ollie Bearman, who looked up from where he was very happily slurping a suspiciously neon smoothie.

Ollie raised an eyebrow. “What’s the problem?”

Kimi lifted one arm limply and waved the tablet in the air like a white flag of surrender.

“This. Derivatives. Partial equations. I don’t know. Numbers are evil.”

Ollie blinked once. Then grinned — the kind of grin that meant he was enjoying Kimi’s suffering way too much.

“You know,” he said thoughtfully, “Arthur Leclerc almost failed stats back in F3.”

Kimi turned his head enough to squint at him. “Seriously?”

“Yeah. Like, barely passed.”

Kimi perked up slightly, seizing onto the news like a lifeline. If Arthur — who had a literal racing dynasty backing him — struggled, maybe there was hope for the rest of them.

“How’d he survive?” Kimi asked, sitting up slightly.

Ollie’s grin widened.

“Oscar.”

Kimi stared at him. “Piastri?”

“Yep. Quiet nerd back at Prema. Absolute lifesaver. Helped Arthur cram for finals and everything.”

Kimi narrowed his eyes. He thought about Oscar: quiet, steady, terrifyingly good at everything he touched, like someone had programmed him in a lab.

Of course Oscar would have hidden superpowers. Of course.

Kimi hesitated, pride warring with desperation.

And then sighed dramatically, letting his head thunk back against the couch.

“Fine,” he said. “Find me Piastri. I have no pride left.”

Which was how, ten minutes later, they ended up with Oscar Piastri sitting cross-legged in the McLaren motorhome, frowning deeply at Kimi’s tablet like it had personally offended him.

“Okay,” Oscar muttered, squinting, “it’s not impossible. It’s just badly worded.”

Kimi leaned forward, full of hope — desperate, grasping hope.

Maybe this would be fine. Maybe Oscar Piastri — quiet, unflappable, secret nerd of Prema lore — could fix this disaster.

Five minutes later, that hope was dead.

Oscar exhaled slowly, dragging a hand through his hair. “I’m going to be honest with you, mate: I have no idea what they’re asking for.”

Kimi flailed, waving his hands like he could physically summon better news. “But you saved Arthur! You’re the math guy!”

Oscar held up a hand, grimacing. “That was basic stats, Kimi. You know, averages. Standard deviations. This—” he pointed at the tablet like it might bite him, “—this is multivariable calculus meets actual sadism.”

Ollie Bearman, who had been perched nearby pretending not to watch the trainwreck unfold, snorted into his water bottle.

Oscar sighed again, this time reaching for his phone.

“No—” Kimi said, panicked, feeling his dignity slipping further into the abyss. “Don’t call someone. Don’t bother anyone. I’ll just fail and move to a cabin in the woods, it’s fine—”

Oscar was already dialing.

“Relax,” he said, calm as anything. “Felicity’s here. She likes this stuff.”

Five minutes later, Felicity Piastri wandered into the motorhome.

Kimi had seen her around the paddock plenty of times over the last year.

The first two things he’d learned about Oscar’s wife were simple:

1. She was tiny and startlingly pretty — the kind of pretty that could probably kill a man if she wanted to.

2. If Felicity Piastri was somewhere, Bee Piastri, Oscar’s terrifyingly adorable four-year-old daughter, was never far behind.

Today was no exception.

Bee marched in beside her mother, two neat pigtails bouncing with every step, each tied with papaya-colored bobbles (a detail that felt almost aggressively on-brand). A stuffed frog plushie dangled from one hand, like a trusted battle companion.

Both of them — Felicity and Bee — looked unfairly bright and well-rested for how emotionally wounded Kimi felt.

Oscar, completely unbothered by the incoming reinforcements, handed Felicity the tablet without preamble.

She glanced at it. Paused. Then blinked slowly.

“You’re all stumped by this?” she asked, her voice dripping with mild disbelief.

Kimi wanted the floor to open up and swallow him whole.

“It’s the notation!” he blurted defensively. “And the question’s vague! And the examples were misleading!”

Felicity tilted her head, looking at him with the kind of fond pity reserved for particularly slow puppies. “It’s literally just a chain rule application with a matrix shortcut.”

“That’s not helping!” Ollie said, muffled into the crook of his elbow where he was laughing himself into an early grave.

Meanwhile, Bee had clambered neatly onto Oscar’s lap without hesitation, perching herself like a queen surveying her court. Kimi noticed absently how Oscar automatically shifted to make room for her — steadying her with one hand, pressing a soft kiss to her temple like it was muscle memory.

“Mama, is it hard?” Bee asked, peering at the tablet with great seriousness.

Felicity smiled. “Not really. But it’s annoying.”

Bee thought about that for a second. Then squared her tiny shoulders like she was preparing for battle.

“Can I try?” she asked.

Oscar sighed deeply. “Bee, it’s complicated—”

But Bee was already moving, plucking the tablet from his hand like it was no big deal, mumbling to herself under her breath.

“Okay, so you take this one first because it’s inside the brackets... and then you swap the middle bits because that’s the rule from the blue notebook... and then you put it all together and it looks like a frog but it’s actually a plus sign.”

Kimi blinked.

Ollie blinked.

Oscar just shook his head like a man who had accepted the chaos a long time ago.

Three minutes later, Bee beamed, handed the tablet back to her mother, and swung her legs happily.

“There,” she said proudly. “Now it’s not grumpy anymore.”

Felicity leaned over, checked the solution... And grinned.

“She’s right,” she said brightly. “Great job, sweetheart!”

Oscar gave a low, half-proud, half-resigned chuckle. “Welcome to my life.”

Kimi stared at the screen.

A four-year-old. A four-year-old had solved the math problem correctly in under three minutes.

Maybe he shouldn’t be surprised. He had heard rumors last year — something about Bee spotting an issue with a McLaren suspension load calculation before any of the engineers did.

But seeing it in real time?

Devastating.

Absolutely devastating.

“I— how did you—?” Kimi stuttered, still struggling to comprehend reality.

Bee shrugged like it was the most obvious thing in the world. “Mama says numbers are friends. You just have to make them sit next to each other nicely.”

Kimi blinked down at the tablet, then at Bee, then back again.

Maybe... maybe racing cars was safer. Maybe he should stick to corners and apexes where the worst that could happen was a spin, not having his soul annihilated by a toddler.

Felicity kissed the top of Bee’s head and said entirely too casually, “There you go. Courtesy of a four-year-old.”

Oscar smiled and held out a hand. “Great job, Bumblebee.”

Bee high-fived her father so hard the smack echoed around the motorhome.

Kimi slumped back into his seat, utterly defeated.

Maybe he had brought shame to the grid after all.

Later, Kimi found himself slumped in the corner of the McLaren motorhome, a half-crushed juice box in his hand — courtesy of Bee, who had handed it over solemnly “for bravery.”

The worst part?

He genuinely needed it.

He sipped the apple juice in silence, staring into the middle distance, quietly reconsidering his entire academic career.

Maybe he could just... never open a math textbook again. Maybe he could live the rest of his life solely calculating apex speeds and brake bias. Maybe if he was fast enough, no one would ever ask him to solve another derivative.

Maybe.

Across the room, Felicity leaned against the table, arms folded, smiling sweetly — the kind of sweet that definitely had shark teeth hiding underneath.

“Bee’s better at recognizing patterns than most adults,” she said casually, like she wasn’t casually shattering the egos of Formula One drivers before lunchtime. “She’s been beating Oscar at card games since she was two.”

Oscar, sitting beside Kimi and munching on a cookie he definitely hadn’t earned, patted Kimi’s shoulder with exaggerated sympathy.

“Don’t feel bad,” he said, trying — and failing — not to laugh. “She inherited her mother’s brain.”

Kimi just groaned into his hands.

It didn’t help that Bee chose that exact moment to skip past them, Button the Frog tucked securely under one arm and a packet of glittery frog-shaped stickers in the other.

She looked so pleased with herself. Completely oblivious to the devastation she had left behind. Or maybe — horrifying thought — not oblivious at all.

Kimi made a note to himself:

Never challenge Bee to anything involving numbers.

Never doubt Felicity’s terrifying brain ever again.

Maybe just stick to driving cars really fast. It was safer for his dignity.

Probably.

Maybe.

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