We look at the division of 821359 by 81 
Let's see how many times 81 fits into 821359.

On to step 1:
81 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 81

Step 2:
When dividing 82 by 81, we get 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 81 from 82 leaves us with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 81

On to step 3:
11 divided by 81 is 0 with a remainder of 11.
The next digit of our result is 0. 
Result so far: 10.0
Deduct 0 from 11 and we're left with 11.
Append the next digit (3) from the dividend to 11 and continue with: 113 / 81

Going ahead to step 4:
If we divide 113 by 81, we get 1 and a remainder of 32.
Use 1 as the next digit of our solution. 
Result so far: 101.0
Subtracting 81 from 113 leaves us with 32.
Bring next digit (5) of the dividend behind the 32 and repeat the process: 325 / 81

Moving on to step 5:
81 can be fit into 325 4 times, resulting in a remainder of 1.
The next digit of our result is 4. 
Result so far: 1014.0
The remainder is 1 after subtracting 324 from 325.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 81

On to step 6:
19 divided by 81 is 0 with a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 10140.0
Subtract 0 from 19 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
190 divided by 81 is 2 with a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 10140.2
Subtract 162 from 190 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 8:
If we divide 280 by 81, we get 3 and a remainder of 37.
Write down 3 as next digit of the result. 
Result so far: 10140.23
Subtract 243 from 280 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 9:
The number 81 fits into 370 4 times, leaving a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 10140.234
If we subtract 324 from 370, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 10:
81 goes into 460 5 times with a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 10140.2345
If we subtract 405 from 460, 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 11:
When dividing 550 by 81, we get 6 with a remainder of 64.
Record the quotient 6 as the next digit in the result. 
Result so far: 10140.23456
Deduct 486 from 550 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 12:
If we divide 640 by 81, we get 7 and a remainder of 73.
Write down 7 as next digit of the result. 
Result so far: 10140.234567
Subtracting 567 from 640 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 13:
The number 81 fits into 730 9 times, leaving a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 10140.2345679
Subtract 729 from 730 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 14:
10 divided by 81 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 10140.2345679
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 10140.2345679, with a leftover of 1e-08.