Let's divide 91158957 by 815
We're looking to find how many times 815 goes into 91158957.

On to step 1:
815 can be fit into 9 0 times, resulting in a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 815

On to step 2:
The number 815 fits into 91 0 times, leaving a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Bring next digit (1) of the dividend behind the 91 and repeat the process: 911 / 815

Moving on to step 3:
815 can be fit into 911 1 times, resulting in a remainder of 96.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 815 from 911 to get 96.
Bring next digit (5) of the dividend behind the 96 and repeat the process: 965 / 815

On to step 4:
815 goes into 965 1 times with a remainder of 150.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Subtracting 815 from 965 leaves us with 150.
Append the next digit (8) from the dividend to 150 and continue with: 1508 / 815

Going ahead to step 5:
When dividing 1508 by 815, we get 1 with a remainder of 693.
Write down 1 as next digit of the result. 
Result so far: 111.0
Subtracting 815 from 1508 leaves us with 693.
Grab the next digit (9) from the dividend, add it to 693, then carry on: 6939 / 815

Moving on to step 6:
815 can be fit into 6939 8 times, resulting in a remainder of 419.
Write down 8 as next digit of the result. 
Result so far: 1118.0
Deduct 6520 from 6939 and we're left with 419.
Include the next digit (5) from the dividend after 419, then repeat: 4195 / 815

Moving on to step 7:
If we divide 4195 by 815, we get 5 and a remainder of 120.
The next digit of our result is 5. 
Result so far: 11185.0
If we take 4075 away from 4195, we end up with 120.
Grab the next digit (7) from the dividend, add it to 120, then carry on: 1207 / 815

Moving on to step 8:
When dividing 1207 by 815, we get 1 with a remainder of 392.
The number 1 becomes the next digit in our result. 
Result so far: 111851.0
If we subtract 815 from 1207, we get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

On to step 9:
If we divide 3920 by 815, we get 4 and a remainder of 660.
Record the quotient 4 as the next digit in the result. 
Result so far: 111851.4
If we subtract 3260 from 3920, we get 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Going ahead to step 10:
When dividing 6600 by 815, we get 8 with a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 111851.48
If we subtract 6520 from 6600, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 11:
The number 815 fits into 800 0 times, leaving a remainder of 800.
The next digit of our result is 0. 
Result so far: 111851.48
The remainder is 800 after subtracting 0 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Advancing to step 12:
815 goes into 8000 9 times with a remainder of 665.
Record the quotient 9 as the next digit in the result. 
Result so far: 111851.4809
If we subtract 7335 from 8000, we get 665.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6650, and continue the process.

On to step 13:
815 goes into 6650 8 times with a remainder of 130.
Write down 8 as next digit of the result. 
Result so far: 111851.48098
If we subtract 6520 from 6650, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 14:
1300 divided by 815 is 1 with a remainder of 485.
The number 1 becomes the next digit in our result. 
Result so far: 111851.480981
The remainder is 485 after subtracting 815 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

On to step 15:
When dividing 4850 by 815, we get 5 with a remainder of 775.
Use 5 as the next digit of our solution. 
Result so far: 111851.4809815
Subtract 4075 from 4850 to get 775.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7750, and continue the process.

On to step 16:
When dividing 7750 by 815, we get 9 with a remainder of 415.
Use 9 as the next digit of our solution. 
Result so far: 111851.48098159
If we take 7335 away from 7750, we end up with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

The final outcome is 111851.48098159, with a leftover of 4.15e-07.