Pi Day 2018: Celebrate 3/14 with discounts on pizza, pies and more

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The most common way is to eat something that sounds like pi: such as a fruit pie or a pizza pie. Pi is the magical mathematical constant: It appears as an infinitely repeating fraction and no matter how big or small a circle is, the ratio of Pi stays the same.

$3.14 won't get you a fancy cup of coffee at your local Starbucks, but it will get you a pie at one of your favorite pizza joints.

Pie Five: All specialty pizzas will be $3.14 on March 14.

HUNGRY HOWIE'S: You can get a medium one-topping pizza for $3.14 on "Pi" Day when you purchase Howie Bread.

Dominos: Pizzas are buy one get one free this week when you order online.

A pair of chain restaurants are celebrating National Pi (e) Day.

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At all four First Slice Pie Cafe locations (Evanston, Ravenswood Manor, Andersonville and Ravenswood proper), order one slice of pie and get a second for half off. Promotion excludes full pies.

Bojangles': Bojangles' will offer three sweet potato pies for $3.14 all day Wednesday.

Pie Five: You don't need to explain an equation to partake in the Pi Day fun.

Willamette Valley Pie Co.: $1 slice of pie and $3.14 off any 9-inch pie (limit 2). Allen and Frisco locations will also offer deals; check stores' Facebook pages for details.

It's approximately 3.14159. Round it down to two decimal points and you get 3.14. Customers who want a discounted pie should go to the restaurant's site before Wednesday and enter their information to receive a coupon by email.