Round 487.010 to the nearest whole number
487.010 rounded to the nearest whole number is 487.
It rounds down because the decimal fraction
part of the number is less than exactly 0.5.
If it had been more than exactly 0.5 it would
have rounded up.
If the decimal fraction part of the number happens
to be exactly 0.5, then the rounding would be to
the nearest even number.
Examples with decimal exactly 0.5 are
487.500000 ... rounds to 488
488.500000 ... rounds to 488