Today, March 14th, is National Pi Day, the celebration of the first three digits of the mathematical constant Pi or 3.14. In honor of the big day, several stores are giving you the chance to save on a 'pi'. According to USA Today, there are quite a few pizza deals today in honor of Pi day. At 7-Eleven--with the 7Rewards app--you can get one slice of pizza for 50 cents. At Blaze Pizza in the Frandor Shopping Center, you can get a $3.14 Pi Day deal today on custom pizzas. Keep in mind that you'll need their app in order to get this deal. For National Pi Day at Hungry Howie's you can get a medium one-topping pizza for $3.14. You'll need to purchase some Howie Bread at the regular menu price and use the promo code 19PI to get this deal. It's for carry out order only.

Some of the other places offering Pi Deals today including Kroger, Boston Market, Biggby Coffee and Whole Foods Market. Click here to see all the National Pi Day deals.