15 goes into 645 90 times
0.0062 times.
645 divided by 24 equals 26 with a remainder of 21.
645/32 = 20 5/32 (or 20 with 5 remainder)
16.125 times or 16 with remainder 5.
161 times with a remainder of 1 or 161.25 times
80 and 5/8
322 with remainder 1.
92 with remainder 1.
Once
2 times with a remainder of 8
43/19 = 2 remainder 5