We're dividing 86391152 by 99 
We want to divide 86391152 by 99.

Let's proceed to step 1:
99 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 99

Advancing to step 2:
86 divided by 99 is 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Fetch the next digit (3) from the dividend, attach it to 86 and continue: 863 / 99

Advancing to step 3:
When dividing 863 by 99, we get 8 with a remainder of 71.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 792 from 863 to get 71.
Append the next digit (9) from the dividend to 71 and continue with: 719 / 99

Moving on to step 4:
99 can be fit into 719 7 times, resulting in a remainder of 26.
The next digit of our result is 7. 
Result so far: 87.0
The remainder is 26 after subtracting 693 from 719.
Grab the next digit (1) from the dividend, add it to 26, then carry on: 261 / 99

Going ahead to step 5:
99 goes into 261 2 times with a remainder of 63.
Write down 2 as next digit of the result. 
Result so far: 872.0
Subtracting 198 from 261 leaves us with 63.
Append the next digit (1) from the dividend to 63 and continue with: 631 / 99

Advancing to step 6:
The number 99 fits into 631 6 times, leaving a remainder of 37.
Write down 6 as next digit of the result. 
Result so far: 8726.0
If we take 594 away from 631, we end up with 37.
Fetch the next digit (5) from the dividend, attach it to 37 and continue: 375 / 99

On to step 7:
When dividing 375 by 99, we get 3 with a remainder of 78.
Use 3 as the next digit of our solution. 
Result so far: 87263.0
Subtract 297 from 375 to get 78.
Fetch the next digit (2) from the dividend, attach it to 78 and continue: 782 / 99

Advancing to step 8:
782 divided by 99 is 7 with a remainder of 89.
Write down 7 as next digit of the result. 
Result so far: 872637.0
If we take 693 away from 782, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 9:
890 divided by 99 is 8 with a remainder of 98.
Write down 8 as next digit of the result. 
Result so far: 872637.8
The remainder is 98 after subtracting 792 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

On to step 10:
When dividing 980 by 99, we get 9 with a remainder of 89.
Put 9 as the next digit of the answer. 
Result so far: 872637.89
Subtract 891 from 980 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Going ahead to step 11:
When dividing 890 by 99, we get 8 with a remainder of 98.
Write down 8 as next digit of the result. 
Result so far: 872637.898
The remainder is 98 after subtracting 792 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 12:
980 divided by 99 is 9 with a remainder of 89.
Record the quotient 9 as the next digit in the result. 
Result so far: 872637.8989
Subtracting 891 from 980 leaves us with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 13:
99 can be fit into 890 8 times, resulting in a remainder of 98.
Use 8 as the next digit of our solution. 
Result so far: 872637.89898
If we subtract 792 from 890, we get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 14:
980 divided by 99 is 9 with a remainder of 89.
Put 9 as the next digit of the answer. 
Result so far: 872637.898989
Deduct 891 from 980 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 15:
The number 99 fits into 890 8 times, leaving a remainder of 98.
Write down 8 as next digit of the result. 
Result so far: 872637.8989898
If we take 792 away from 890, we end up with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 16:
99 goes into 980 9 times with a remainder of 89.
Record the quotient 9 as the next digit in the result. 
Result so far: 872637.89898989
If we take 891 away from 980, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

The final outcome is 872637.89898989, with a leftover of 8.9e-08.