Well, isn't that a happy little math question! If we take 54 and divide it by 15, we find that 15 goes into 54 three times, with a remainder of 9. Just like painting a beautiful landscape, sometimes we have to break things down into smaller parts to see the whole picture.
18
54.6 times, or 54 3/5 times, or 54 times with a remainder of 9. 819/15 = 54 9/15 = 54 3/5
54 goes into 285 5 times with remainder 15.
54 goes into 823 15 times with remainder 13.
2 goes into 30 fifteen times. 2 goes into 54 twenty-seven times.
54
54 can go into 54 once, with remainder 4.
54
18.03 times.... 974/54 = 18.037...
300/75 = 4
41
18 times.