We look at the division of 863649 by 91 
We're looking to find how many times 91 goes into 863649.

Let's proceed to step 1:
When dividing 8 by 91, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 91

Going ahead to step 2:
91 goes into 86 0 times with a remainder of 86.
The next digit of our result is 0. 
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 / 91

Advancing to step 3:
If we divide 863 by 91, we get 9 and a remainder of 44.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we take 819 away from 863, we end up with 44.
Append the next digit (6) from the dividend to 44 and continue with: 446 / 91

Moving on to step 4:
The number 91 fits into 446 4 times, leaving a remainder of 82.
The number 4 becomes the next digit in our result. 
Result so far: 94.0
If we take 364 away from 446, we end up with 82.
Append the next digit (4) from the dividend to 82 and continue with: 824 / 91

Going ahead to step 5:
When dividing 824 by 91, we get 9 with a remainder of 5.
The next digit of our result is 9. 
Result so far: 949.0
If we subtract 819 from 824, we get 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 91

Let's proceed to step 6:
59 divided by 91 is 0 with a remainder of 59.
Record the quotient 0 as the next digit in the result. 
Result so far: 9490.0
The remainder is 59 after subtracting 0 from 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 7:
The number 91 fits into 590 6 times, leaving a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 9490.6
If we take 546 away from 590, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 8:
The number 91 fits into 440 4 times, leaving a remainder of 76.
Write down 4 as next digit of the result. 
Result so far: 9490.64
If we subtract 364 from 440, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 9:
91 goes into 760 8 times with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 9490.648
Deduct 728 from 760 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.

On to step 10:
91 can be fit into 320 3 times, resulting in a remainder of 47.
Write down 3 as next digit of the result. 
Result so far: 9490.6483
Deduct 273 from 320 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 11:
The number 91 fits into 470 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 9490.64835
Subtract 455 from 470 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 12:
91 can be fit into 150 1 times, resulting in a remainder of 59.
The number 1 becomes the next digit in our result. 
Result so far: 9490.648351
Deduct 91 from 150 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Advancing to step 13:
91 can be fit into 590 6 times, resulting in a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 9490.6483516
If we subtract 546 from 590, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 14:
91 goes into 440 4 times with a remainder of 76.
The next digit of our result is 4. 
Result so far: 9490.64835164
If we subtract 364 from 440, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final result is 9490.64835164 with a remainder of 7.6e-08.