Or maybe an all-rational math? I'm mainly curious as my CASIO fx-115W calculator returns a result of exactly 4 if I input 8^(2/3), but I do not know how it arrives at the answer.
Calculators often resort to built-in tables.
The easiest solution is probably to round off the last 2 digits of the full precision.
-- brandon s allbery allbery.b@gmail.com
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