the most precise fraction that is common amongst all the numbers is 2434/2659.

Hmm... that's a good one. And, if I set my adding machine to integer only (set number of decimal places to "0" instead of "2" or "Float") and do the division first, then the multiplication (to avoid overflow) I get an integer answer that works. That may be how they're doing it. I'll email them tonight and see if I strike any nerves.

tanstaafl.