It’s a most auspicious holiday for math lovers. Saturday, March 14, 2015 is Pi Day, a celebration of the irrational number that describes the ratio of a circle’s diameter to its circumference. Pi is approximately 3.141592653, but it continues at random to infinity. No matter how many numbers after the decimal place you use, the only way to get it exactly is to use the symbol pi.
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Spoiler Alert:   i 8 sum Pi 
h/t: Doodle Craft