We look at the division of 815356 by 86 
We want to divide 815356 by 86.

On to step 1:
When dividing 8 by 86, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 86

Going ahead to step 2:
86 can be fit into 81 0 times, resulting in a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Fetch the next digit (5) from the dividend, attach it to 81 and continue: 815 / 86

Advancing to step 3:
The number 86 fits into 815 9 times, leaving a remainder of 41.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 774 from 815 leaves us with 41.
Include the next digit (3) from the dividend after 41, then repeat: 413 / 86

Step 4:
When dividing 413 by 86, we get 4 with a remainder of 69.
Write down 4 as next digit of the result. 
Result so far: 94.0
Deduct 344 from 413 and we're left with 69.
Fetch the next digit (5) from the dividend, attach it to 69 and continue: 695 / 86

Step 5:
When dividing 695 by 86, we get 8 with a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 948.0
Subtract 688 from 695 to get 7.
Bring next digit (6) of the dividend behind the 7 and repeat the process: 76 / 86

On to step 6:
86 can be fit into 76 0 times, resulting in a remainder of 76.
Write down 0 as next digit of the result. 
Result so far: 9480.0
If we take 0 away from 76, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 7:
86 goes into 760 8 times with a remainder of 72.
The next digit of our result is 8. 
Result so far: 9480.8
Deduct 688 from 760 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 8:
If we divide 720 by 86, we get 8 and a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 9480.88
Deduct 688 from 720 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 9480.88, with a leftover of 0.032.