Riddle High School seventh grader Amber Gulrich works on writing out pi to the 1120th decimal place during Pi Day at the school on Wednesday, March 14, 2012 in Riddle, Ore. (AP Photo/The News-Review, Michael Sullivan)
Wednesday is March 14, or 3-14, the first three digits of the number pi.
Pi is the uneven ratio of a circle's circumference to its diameter.
Wednesday, March 14, is also Albert Einstein's birthday. The famed physicist would have turned 133 on Wednesday.
