We look at the division of 91231590 by 861 
We want to divide 91231590 by 861.

Advancing to step 1:
861 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.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 861

Advancing to step 2:
91 divided by 861 is 0 with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Take the next digit (2) from the dividend and append it to 91, then repeat: 912 / 861

Going ahead to step 3:
912 divided by 861 is 1 with a remainder of 51.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 861 from 912, we get 51.
Include the next digit (3) from the dividend after 51, then repeat: 513 / 861

Advancing to step 4:
When dividing 513 by 861, we get 0 with a remainder of 513.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we subtract 0 from 513, we get 513.
Append the next digit (1) from the dividend to 513 and continue with: 5131 / 861

Moving on to step 5:
When dividing 5131 by 861, we get 5 with a remainder of 826.
Use 5 as the next digit of our solution. 
Result so far: 105.0
Deduct 4305 from 5131 and we're left with 826.
Append the next digit (5) from the dividend to 826 and continue with: 8265 / 861

Going ahead to step 6:
861 goes into 8265 9 times with a remainder of 516.
The number 9 becomes the next digit in our result. 
Result so far: 1059.0
If we take 7749 away from 8265, we end up with 516.
Append the next digit (9) from the dividend to 516 and continue with: 5169 / 861

Going ahead to step 7:
If we divide 5169 by 861, we get 6 and a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 10596.0
The remainder is 3 after subtracting 5166 from 5169.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 861

On to step 8:
30 divided by 861 is 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 105960.0
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 9:
861 can be fit into 300 0 times, resulting in a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 105960.0
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Advancing to step 10:
861 can be fit into 3000 3 times, resulting in a remainder of 417.
Use 3 as the next digit of our solution. 
Result so far: 105960.03
Subtract 2583 from 3000 to get 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

Moving on to step 11:
861 goes into 4170 4 times with a remainder of 726.
Put 4 as the next digit of the answer. 
Result so far: 105960.034
Deduct 3444 from 4170 and we're left with 726.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7260, and continue the process.

On to step 12:
When dividing 7260 by 861, we get 8 with a remainder of 372.
Write down 8 as next digit of the result. 
Result so far: 105960.0348
Subtract 6888 from 7260 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Going ahead to step 13:
The number 861 fits into 3720 4 times, leaving a remainder of 276.
Write down 4 as next digit of the result. 
Result so far: 105960.03484
Subtracting 3444 from 3720 leaves us with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Step 14:
The number 861 fits into 2760 3 times, leaving a remainder of 177.
Use 3 as the next digit of our solution. 
Result so far: 105960.034843
The remainder is 177 after subtracting 2583 from 2760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Advancing to step 15:
1770 divided by 861 is 2 with a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 105960.0348432
The remainder is 48 after subtracting 1722 from 1770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 16:
The number 861 fits into 480 0 times, leaving a remainder of 480.
The next digit of our result is 0. 
Result so far: 105960.0348432
The remainder is 480 after subtracting 0 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

After the division, we end up with 105960.0348432 and a remainder of 4.8e-07.