Major restaurant chains celebrate Pi Day with pizza and pie deals

• Pi Day (3/14) leads to pizza pie deals at major chains like Pizza Hut, Taco Bell, Smoothie King, 7-Eleven, and more • Pizza Hut offering BOGO deal on large pizzas from 3/12-3/14 • Taco Bell brought back Mexican Pizza for $3.14 on 3/14 for rewards members • Smoothie King selling 20-oz apple pie smoothies for $3.14 on 3/14 • Other chains like BJ's, Blaze Pizza, Burger King also have Pi Day deals