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TIL NASA calculated that you only need 40 digits of Pi to calculate the circumference of the observable universe, to the accuracy of 1 hydrogen atom

www.jpl.nasa.gov How Many Decimals of Pi Do We Really Need? - Edu News | NASA/JPL Edu

While world record holders may have memorized more than 70,000 digits of pi, a JPL engineer explains why you really only need a tiny fraction of that for most calculations – even at NASA.

How Many Decimals of Pi Do We Really Need? - Edu News | NASA/JPL Edu
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