28355491 ÷ 991 
We're looking to find how many times 991 goes into 28355491.

Going ahead to step 1:
The number 991 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 991

Going ahead to step 2:
991 goes into 28 0 times with a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Include the next digit (3) from the dividend after 28, then repeat: 283 / 991

Let's proceed to step 3:
283 divided by 991 is 0 with a remainder of 283.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 283, we get 283.
Append the next digit (5) from the dividend to 283 and continue with: 2835 / 991

On to step 4:
991 can be fit into 2835 2 times, resulting in a remainder of 853.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1982 from 2835 to get 853.
Include the next digit (5) from the dividend after 853, then repeat: 8535 / 991

On to step 5:
If we divide 8535 by 991, we get 8 and a remainder of 607.
The next digit of our result is 8. 
Result so far: 28.0
Deduct 7928 from 8535 and we're left with 607.
Bring next digit (4) of the dividend behind the 607 and repeat the process: 6074 / 991

Moving on to step 6:
The number 991 fits into 6074 6 times, leaving a remainder of 128.
Put 6 as the next digit of the answer. 
Result so far: 286.0
If we subtract 5946 from 6074, we get 128.
Bring next digit (9) of the dividend behind the 128 and repeat the process: 1289 / 991

Moving on to step 7:
991 can be fit into 1289 1 times, resulting in a remainder of 298.
The next digit of our result is 1. 
Result so far: 2861.0
If we take 991 away from 1289, we end up with 298.
Take the next digit (1) from the dividend and append it to 298, then repeat: 2981 / 991

Let's proceed to step 8:
991 can be fit into 2981 3 times, resulting in a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 28613.0
If we subtract 2973 from 2981, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
If we divide 80 by 991, we get 0 and a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 28613.0
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 10:
When dividing 800 by 991, we get 0 with a remainder of 800.
The next digit of our result is 0. 
Result so far: 28613.0
If we take 0 away from 800, we end up with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

The final result is 28613.0 with a remainder of 0.8.