We look at the division of 52212403 by 81 
We want to divide 52212403 by 81.

Step 1:
When dividing 5 by 81, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 81

Going ahead to step 2:
81 goes into 52 0 times with a remainder of 52.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 52, we get 52.
Take the next digit (2) from the dividend and append it to 52, then repeat: 522 / 81

Step 3:
If we divide 522 by 81, we get 6 and a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 486 from 522 to get 36.
Fetch the next digit (1) from the dividend, attach it to 36 and continue: 361 / 81

Going ahead to step 4:
81 goes into 361 4 times with a remainder of 37.
Put 4 as the next digit of the answer. 
Result so far: 64.0
Subtracting 324 from 361 leaves us with 37.
Take the next digit (2) from the dividend and append it to 37, then repeat: 372 / 81

Moving on to step 5:
81 can be fit into 372 4 times, resulting in a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 644.0
The remainder is 48 after subtracting 324 from 372.
Include the next digit (4) from the dividend after 48, then repeat: 484 / 81

Going ahead to step 6:
If we divide 484 by 81, we get 5 and a remainder of 79.
The number 5 becomes the next digit in our result. 
Result so far: 6445.0
Deduct 405 from 484 and we're left with 79.
Append the next digit (0) from the dividend to 79 and continue with: 790 / 81

Advancing to step 7:
790 divided by 81 is 9 with a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 64459.0
If we take 729 away from 790, we end up with 61.
Append the next digit (3) from the dividend to 61 and continue with: 613 / 81

On to step 8:
81 can be fit into 613 7 times, resulting in a remainder of 46.
Use 7 as the next digit of our solution. 
Result so far: 644597.0
Subtract 567 from 613 to 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.

Going ahead to step 9:
81 can be fit into 460 5 times, resulting in a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 644597.5
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.

Step 10:
When dividing 550 by 81, we get 6 with a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 644597.56
The remainder is 64 after subtracting 486 from 550.
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 11:
If we divide 640 by 81, we get 7 and a remainder of 73.
Put 7 as the next digit of the answer. 
Result so far: 644597.567
If we take 567 away from 640, we end up 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 12:
The number 81 fits into 730 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 644597.5679
Subtracting 729 from 730 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 13:
If we divide 10 by 81, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 644597.5679
If we subtract 0 from 10, we 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.

Going ahead to step 14:
If we divide 100 by 81, we get 1 and a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 644597.567901
Subtract 81 from 100 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 15:
When dividing 190 by 81, we get 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 644597.5679012
Deduct 162 from 190 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 16:
81 goes into 280 3 times with a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 644597.56790123
The remainder is 37 after subtracting 243 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

The final result is 644597.56790123 with a remainder of 3.7e-08.