The Pi Day

Hi, Today is 14th of Murch, it is an annual US celebration commemorating the mathematical constant π (pi). Congratulations! :) http://en.wikipedia.org/wiki/Pi_Day

And btw, here is a nice video about how the number Pi sounds: http://www.youtube.com/watch?v=OMq9he-5HUU#t=13

Enjoy and Happy Pi day!:)