Steve G. wrote: << Would five trillion digits be enough to compute the circumference of my wading pool? Its diameter is five feet, more or less.

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It depends on how accurate you want to be. Since you already introduced significant inaccuracy with the very rough estimate of your pool's diameter, you wouldn't want any additional inaccuracy to creep in by using only 5x10^12 digits of pi. --Dan _____________________________________________________________________ "It don't mean a thing if it ain't got that certain je ne sais quoi." --Peter Schickele