BOISE, Idaho — Treasure Valley pizza chains are celebrating a mathematical concept in a delicious way Thursday. 

Both Blaze Pizza and Firenza Pizza are offering up a special deal to mark Pi Day - that's Thursday, March 14 - with pizzas for only $3.14. 

The Firenza deal applies to the restaurant's ten-inch cheese pizza only, while Blaze Pizza's $3.14 deal can be used for any pizza, as long as customers download the Blaze Pizza app. 

Pizza fans have to come into the restaurants to order to get the deal. Both promotions run until 9 p.m. Thursday.

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Firenza Pizza is located at 99 West Main Street in Boise, while Blaze Pizza has locations at 2206 North Eagle Road in Meridian, 16375 Midland Boulevard in Nampa, 4363 West Grey Fox Street in Eagle and1925 Fillmore Street in Twin Falls.