[Max in Utah]

Actually, 3.1428571 etc.

Ahem . . . 3.1415926. Too much pi will give your calcs a bellyache.

[glennaro]

I recall a quick way to obtain pi accurate to 6 decimal places on the simplest of calculators is to remember 113355. Divide the last three digits by the first three and you get 3.141592. Saved me a few times in the “old days” of hand-held calculators with only the basic functions.