Famous in math, pi is crucial in the world of physics as well. But how do we write it? Search 2,000,000,000 decimal digits of Pi, E, the Square Root of 2, and 500M digits of Phi (the Golden Ratio) for the first occurrence of a numeric string, or return 100 digits beginning from the specified starting position (excluding the first whole number digit). How accurately can we calculate pi using hundreds of REAL pies? Find out! March 14, otherwise known as 3/14 is a special day! For any math enthusiast, these numbers will certainly set off a bell — they are the first three digits of pi. To help you celebrate Pi Day, here are two TED Talks. Here are 10 YouTube Videos for Math Geeks.