78840 ÷ 5 = 15768 R0
No problem, we've got 78840 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 (8) of the dividend behind the 2 and repeat the process: 28 / 5

Step 2:
5 goes into 28 5 times with a remainder of 3.
Write down 5 as next digit of of the result. 
Result so far: 15
Subtract 25 from 28 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 5

Step 3:
5 goes into 38 7 times with a remainder of 3.
Write down 7 as next digit of of the result. 
Result so far: 157
Subtract 35 from 38 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 5

Step 4:
5 goes into 34 6 times with a remainder of 4.
Write down 6 as next digit of of the result. 
Result so far: 1576
Subtract 30 from 34 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 5

Step 5:
5 goes into 40 8 times with a remainder of 0.
Write down 8 as next digit of of the result. 
Result so far: 15768
Subtract 40 from 40 to get 0.

The final result is 15768 with a remainder of 0.