79 ÷ 5 = 15 R4
No problem, we've got 79 and 5 for the division.

Step 1:
5 goes into 7 1 times with a remainder of 2.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 5 from 7 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 5

Step 2:
5 goes into 29 5 times with a remainder of 4.
Write down 5 as next digit of of the result. 
Result so far: 15
Subtract 25 from 29 to get 4.

The final result is 15 with a remainder of 4.