3 x 13 = 39
3
Thrice with a remainder of 3
3 times 3 x 13 = 39
39 ÷ 6 = 6 with remainder 3
3 with remainder 3.
9 whole times, plus 3/4 of one more time.
4 with 3 remaining 39 - 3 = 36 = 9 x 4
39 times.
4 goes into 39, 11 times with a remainder of 3
3 times, with 3 left over.
3 with remainder 39.