81709287 ÷ 991 
We're looking to find how many times 991 goes into 81709287.

Let's proceed to step 1:
The number 991 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 991

Going ahead to step 2:
The number 991 fits into 81 0 times, leaving a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Append the next digit (7) from the dividend to 81 and continue with: 817 / 991

Advancing to step 3:
When dividing 817 by 991, we get 0 with a remainder of 817.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 817 and we're left with 817.
Bring next digit (0) of the dividend behind the 817 and repeat the process: 8170 / 991

Going ahead to step 4:
991 can be fit into 8170 8 times, resulting in a remainder of 242.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 7928 from 8170 to get 242.
Take the next digit (9) from the dividend and append it to 242, then repeat: 2429 / 991

On to step 5:
2429 divided by 991 is 2 with a remainder of 447.
The next digit of our result is 2. 
Result so far: 82.0
Subtracting 1982 from 2429 leaves us with 447.
Take the next digit (2) from the dividend and append it to 447, then repeat: 4472 / 991

On to step 6:
If we divide 4472 by 991, we get 4 and a remainder of 508.
Use 4 as the next digit of our solution. 
Result so far: 824.0
If we subtract 3964 from 4472, we get 508.
Append the next digit (8) from the dividend to 508 and continue with: 5088 / 991

Advancing to step 7:
991 can be fit into 5088 5 times, resulting in a remainder of 133.
Put 5 as the next digit of the answer. 
Result so far: 8245.0
Deduct 4955 from 5088 and we're left with 133.
Append the next digit (7) from the dividend to 133 and continue with: 1337 / 991

On to step 8:
1337 divided by 991 is 1 with a remainder of 346.
Record the quotient 1 as the next digit in the result. 
Result so far: 82451.0
If we subtract 991 from 1337, we get 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Going ahead to step 9:
When dividing 3460 by 991, we get 3 with a remainder of 487.
Record the quotient 3 as the next digit in the result. 
Result so far: 82451.3
Subtracting 2973 from 3460 leaves us with 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

Step 10:
991 can be fit into 4870 4 times, resulting in a remainder of 906.
Write down 4 as next digit of the result. 
Result so far: 82451.34
If we subtract 3964 from 4870, we get 906.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9060, and continue the process.

Step 11:
If we divide 9060 by 991, we get 9 and a remainder of 141.
The next digit of our result is 9. 
Result so far: 82451.349
Subtracting 8919 from 9060 leaves us with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Let's proceed to step 12:
991 can be fit into 1410 1 times, resulting in a remainder of 419.
The next digit of our result is 1. 
Result so far: 82451.3491
Deduct 991 from 1410 and we're left with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Going ahead to step 13:
4190 divided by 991 is 4 with a remainder of 226.
Write down 4 as next digit of the result. 
Result so far: 82451.34914
Subtract 3964 from 4190 to get 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Step 14:
The number 991 fits into 2260 2 times, leaving a remainder of 278.
Use 2 as the next digit of our solution. 
Result so far: 82451.349142
If we subtract 1982 from 2260, we get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

On to step 15:
If we divide 2780 by 991, we get 2 and a remainder of 798.
The next digit of our result is 2. 
Result so far: 82451.3491422
If we take 1982 away from 2780, we end up with 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

Our division results in 82451.3491422 with a remaining 7.98e-06.