78919 ÷ 8 = 9864 R7
We're going to perform division on 78919 with 8 as the divisor.

Step 1:
8 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 / 8

Step 2:
8 goes into 78 9 times with a remainder of 6.
Write down 9 as next digit of of the result. 
Result so far: 9
Subtract 72 from 78 to get 6.
Bring next digit (9) of the dividend behind the 6 and repeat the process: 69 / 8

Step 3:
8 goes into 69 8 times with a remainder of 5.
Write down 8 as next digit of of the result. 
Result so far: 98
Subtract 64 from 69 to get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 8

Step 4:
8 goes into 51 6 times with a remainder of 3.
Write down 6 as next digit of of the result. 
Result so far: 986
Subtract 48 from 51 to get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 8

Step 5:
8 goes into 39 4 times with a remainder of 7.
Write down 4 as next digit of of the result. 
Result so far: 9864
Subtract 32 from 39 to get 7.

The final result is 9864 with a remainder of 7.