![][numberpi]

NASA only uses 15 digits of π for calculating interplanetary travel.

At 40 digits, you could calculate the circumference of a circle the size of the visible universe with an accuracy that'd fall off by less than the diameter of a single hydrogen atom. ⚛️

https://www.jpl.nasa.gov/edu/news/2016/3/16/how-many-decimals-of-pi-do-we-really-need/?platform=hootsuite

[numberpi]: https://s3.gifyu.com/images/pi.jpg