We're dividing 816991 by 81 
We want to divide 816991 by 81.

Let's proceed to step 1:
If we divide 8 by 81, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 81

Moving on to step 2:
If we divide 81 by 81, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 81 away from 81, we end up with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 81

Let's proceed to step 3:
When dividing 6 by 81, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 6, we end up with 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 81

Moving on to step 4:
When dividing 69 by 81, we get 0 with a remainder of 69.
Use 0 as the next digit of our solution. 
Result so far: 100.0
If we take 0 away from 69, we end up with 69.
Take the next digit (9) from the dividend and append it to 69, then repeat: 699 / 81

Advancing to step 5:
If we divide 699 by 81, we get 8 and a remainder of 51.
The next digit of our result is 8. 
Result so far: 1008.0
If we subtract 648 from 699, we get 51.
Grab the next digit (1) from the dividend, add it to 51, then carry on: 511 / 81

Let's proceed to step 6:
When dividing 511 by 81, we get 6 with a remainder of 25.
Put 6 as the next digit of the answer. 
Result so far: 10086.0
Subtract 486 from 511 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 7:
250 divided by 81 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 10086.3
If we take 243 away from 250, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 8:
81 can be fit into 70 0 times, resulting in a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 10086.3
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 9:
81 can be fit into 700 8 times, resulting in a remainder of 52.
Write down 8 as next digit of the result. 
Result so far: 10086.308
Deduct 648 from 700 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 10:
When dividing 520 by 81, we get 6 with a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 10086.3086
Deduct 486 from 520 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 11:
If we divide 340 by 81, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 10086.30864
Deduct 324 from 340 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 12:
If we divide 160 by 81, we get 1 and a remainder of 79.
The next digit of our result is 1. 
Result so far: 10086.308641
Deduct 81 from 160 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 13:
The number 81 fits into 790 9 times, leaving a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 10086.3086419
Deduct 729 from 790 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 14:
81 can be fit into 610 7 times, resulting in a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 10086.30864197
If we take 567 away from 610, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The quotient of the division is 10086.30864197, and the remainder is 4.3e-08.