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.
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.More news: Sexton savours Irish Six Nations title win
More news: Percent Increase in Roseville Gas Prices Since 2016
More news: US Justice Department files regulation to ban 'bump stocks'
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.
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.