[RPM123]

In honor of this "special' day, Pizza Hut is offering free pizzas (in the form of gift cards) for 3.14 years, if you can solve one of the math problems...devised by a Princeton math professor.  Or you can just go out and get one of your favorite pies, savory or sweet.

http://www.cnbc.com/2016/03/09/pizza-hut-national-pi-day-math-contest.html