Only once. By then, there's only room left for 3 more,
so there's no way to stuff 12 in there again.
312÷15 = 20 remainder 12
12 R 12
15 times.
To determine how many times 15 can go into 180, you would perform the division operation 180 ÷ 15. The result of this division is 12, meaning that 15 can go into 180 a total of 12 times without any remainder.
15 will go into 42 two times with 12 left over.
18
15 times, remainder 10
3
1
7.8667 times.
15 goes into 31 twice with a remainder of 1.
2 with remainder 12.