4 with remainder 6.
12 times
18
648 ÷ 12 = 54
54 ÷ 4 = 13 remainder 2
4
2, remainder 12
64 with remainder 11.
It can go into 54 3 times.
12 goes into 67 five times with a remainder of 7.
6 whole times, and 3/4 of one more time
54 can go into 54 once, with remainder 4.
54