78151 ÷ 9 = 8683 R4
We're going to perform division on 78151 with 9 as the divisor.

Step 1:
9 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 9

Step 2:
9 goes into 78 8 times with a remainder of 6.
Write down 8 as next digit of of the result. 
Result so far: 8
Subtract 72 from 78 to get 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 9

Step 3:
9 goes into 61 6 times with a remainder of 7.
Write down 6 as next digit of of the result. 
Result so far: 86
Subtract 54 from 61 to get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 9

Step 4:
9 goes into 75 8 times with a remainder of 3.
Write down 8 as next digit of of the result. 
Result so far: 868
Subtract 72 from 75 to get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 9

Step 5:
9 goes into 31 3 times with a remainder of 4.
Write down 3 as next digit of of the result. 
Result so far: 8683
Subtract 27 from 31 to get 4.

The final result is 8683 with a remainder of 4.