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Slice of…

Too busy memorizing up to the 67,891st digit of our favorite mathematical constant (good luck, potential world-champ) to bake your own treat? Save and order one of Zingerman’s delicious pies. Better yet, sample their three hard-hitters at once with the Nosher Pie Party, which includes pecan, chocolate chess, and cranberry walnut pies. ($50)

Shut Your Pi-Holder

Lady-geeks will be proud to tote all those books to class in this cute homage to the only mathematical constant with a holiday. Forget mnemonics: machine-washable cotton makes this the easiest time you’ll probably ever have with pi. ($25)

Step in Pi

Who has time to tie laces when you’ve got circumferences on the brain? Slip into these pi-bedecked Keds and you’ll be walking on cloud 3.14159… ($67.50)

The Big Chill

What better way to cap off Pi Day than with a nightcap — on the pi rocks? Whip up one of ThinkGeek’s delightfully nerdy Pi-tinis and don’t forget the coup de grace of pi-shaped ice cubes. ($8.99)

Clean as a Pi

Slough away dirt and let your inner math dweeb shine through with these great glycerin soaps. This sample pack of eight pi(e)-inspired fragrances — including pumpkin, key lime, apple, and banana cream — is sure to wet your whistle. ($8)

Pi Kids

Got a little genius on the way? Set your baby on the track to geek-goddess status with this adorable embroidered bib. ($10)

Pi One On

Who knew pi could be so snazzy? Impress the geek-chic ladies with this pi tie. Really impress them if you can recite pi to the 50th decimal without peeking at the tie for help. ($24.95)

E = Albert Einstein’s Birthday

It’s not just Pi Day, it’s also the day the world welcomed one of its most esteemed scientists. Wish Einstein a happy birthday by writing your research findings in this recycled-book journal. ($6.50) Not enough celebration for you? Check out this hat and scarf set that turns the wearer into the physicist’s doppelganger. ($40.00)

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