Let's divide 86396790 by 872
We're looking to find how many times 872 goes into 86396790.

On to step 1:
8 divided by 872 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 872

Going ahead to step 2:
When dividing 86 by 872, we get 0 with a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Include the next digit (3) from the dividend after 86, then repeat: 863 / 872

Going ahead to step 3:
The number 872 fits into 863 0 times, leaving a remainder of 863.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 863 leaves us with 863.
Fetch the next digit (9) from the dividend, attach it to 863 and continue: 8639 / 872

On to step 4:
872 goes into 8639 9 times with a remainder of 791.
Use 9 as the next digit of our solution. 
Result so far: 9.0
The remainder is 791 after subtracting 7848 from 8639.
Fetch the next digit (6) from the dividend, attach it to 791 and continue: 7916 / 872

On to step 5:
If we divide 7916 by 872, we get 9 and a remainder of 68.
Use 9 as the next digit of our solution. 
Result so far: 99.0
Subtract 7848 from 7916 to get 68.
Take the next digit (7) from the dividend and append it to 68, then repeat: 687 / 872

On to step 6:
If we divide 687 by 872, we get 0 and a remainder of 687.
Use 0 as the next digit of our solution. 
Result so far: 990.0
The remainder is 687 after subtracting 0 from 687.
Fetch the next digit (9) from the dividend, attach it to 687 and continue: 6879 / 872

Step 7:
872 goes into 6879 7 times with a remainder of 775.
Put 7 as the next digit of the answer. 
Result so far: 9907.0
The remainder is 775 after subtracting 6104 from 6879.
Include the next digit (0) from the dividend after 775, then repeat: 7750 / 872

Step 8:
872 can be fit into 7750 8 times, resulting in a remainder of 774.
Use 8 as the next digit of our solution. 
Result so far: 99078.0
Subtracting 6976 from 7750 leaves us with 774.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7740, and continue the process.

Moving on to step 9:
872 can be fit into 7740 8 times, resulting in a remainder of 764.
The number 8 becomes the next digit in our result. 
Result so far: 99078.8
Subtracting 6976 from 7740 leaves us with 764.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7640, and continue the process.

Going ahead to step 10:
When dividing 7640 by 872, we get 8 with a remainder of 664.
Write down 8 as next digit of the result. 
Result so far: 99078.88
Subtracting 6976 from 7640 leaves us with 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

The final outcome is 99078.88, with a leftover of 0.664.