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Excel giving incorrect answer to simple multiplication
This is undoubtedly due to some quirk of Excel, but I was using Excel to illustrate how fast doubling increases things. I was using the old story about the person who would work for $ .01 for the fi...
Excel calculates using 16 digits (actually, it uses a 17th digit to round the 16th). Day 49 has 16 digits, day 50 has 17 digits. This means the last digit is rounded.