13
13 times.
2 times with a remainder.
13
0.0769230769
6
how many times can 23 go into 78
no 8 does not go into 78
78 times with a remainder of 4
13 goes into 39 three times. If that's not what you were asking, 39 goes into 78 twice, and 13 goes into 78 six times.
26. 3*26 = 78
78 ÷ 17 = 4