Answer:
64
Explanation:
Looking at the number 63.62, you see that 6 comes immediately after the decimal point.
Now if the number after the decimal point is more than 5 we round up by adding one to the number just before the decimal point which is 3 in this case.
Assuming the number after the decimal point was less than 5 we would round down adding nothing to the number just before the decimal point.