To find which multiple of 8 is closest to 63, we can divide 63 by 8 and check which whole numbers are closest to the quotient.
63 ÷ 8 = 7.875
The quotient is closest to the whole numbers 8 (7.875 is closer to 8 than to 7). So, 8 times the closest whole number, which is 8, will be closest to 63.
Therefore, 8 times 8, which equals 64, is the multiple of 8 closest to 63.