We're dividing 990721 by 91 
We want to figure out the number of times 990721 can be divided by 91.

Going ahead to step 1:
When dividing 9 by 91, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 91

Step 2:
91 can be fit into 99 1 times, resulting in a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 91 from 99 and we're left with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 91

Advancing to step 3:
80 divided by 91 is 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 80, we get 80.
Include the next digit (7) from the dividend after 80, then repeat: 807 / 91

Moving on to step 4:
The number 91 fits into 807 8 times, leaving a remainder of 79.
The next digit of our result is 8. 
Result so far: 108.0
Subtract 728 from 807 to get 79.
Append the next digit (2) from the dividend to 79 and continue with: 792 / 91

Moving on to step 5:
792 divided by 91 is 8 with a remainder of 64.
Use 8 as the next digit of our solution. 
Result so far: 1088.0
Subtract 728 from 792 to get 64.
Include the next digit (1) from the dividend after 64, then repeat: 641 / 91

Advancing to step 6:
When dividing 641 by 91, we get 7 with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 10887.0
The remainder is 4 after subtracting 637 from 641.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
When dividing 40 by 91, we get 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 10887.0
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
The number 91 fits into 400 4 times, leaving a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 10887.04
The remainder is 36 after subtracting 364 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 9:
The number 91 fits into 360 3 times, leaving a remainder of 87.
The number 3 becomes the next digit in our result. 
Result so far: 10887.043
Subtracting 273 from 360 leaves us with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 10:
91 goes into 870 9 times with a remainder of 51.
Put 9 as the next digit of the answer. 
Result so far: 10887.0439
If we take 819 away from 870, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 11:
510 divided by 91 is 5 with a remainder of 55.
Use 5 as the next digit of our solution. 
Result so far: 10887.04395
If we subtract 455 from 510, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 12:
When dividing 550 by 91, we get 6 with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 10887.043956
The remainder is 4 after subtracting 546 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
When dividing 40 by 91, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 10887.043956
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 14:
If we divide 400 by 91, we get 4 and a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 10887.04395604
Subtracting 364 from 400 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

In conclusion, the division gives 10887.04395604 with a balance of 3.6e-08.