I love that you can just take fundamental constants and easily-memorized numbers and jam them together into approximations of things
69^π^√5 is a good approximation of Avagadro's number, for example
or that there are three and pi quarters liters in a gallon
(a bunch more: https://xkcd.com/1047/ )
@Felthry I think it's that that is not where you expect a pi
when you're counting quarters, you're usually counting integer quarters and you're usually adding it to an integer, and you're adding it to an integer ... but not counting integer quarters, which is just weird
@Felthry slightly less accurate than the ones suggested for seconds in a year, but "π seconds is a nanocentury" gets you within about 1 in 200
@packbat "nanocentury" is just inherently fun
"three and pi quarters" is an amusing phrase and i'm not quite sure why