We're dividing 82639724 by 421 
We want to divide 82639724 by 421.

Step 1:
8 divided by 421 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 421

Going ahead to step 2:
The number 421 fits into 82 0 times, leaving a remainder of 82.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 82 leaves us with 82.
Grab the next digit (6) from the dividend, add it to 82, then carry on: 826 / 421

Let's proceed to step 3:
421 goes into 826 1 times with a remainder of 405.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 421 from 826 to get 405.
Include the next digit (3) from the dividend after 405, then repeat: 4053 / 421

Moving on to step 4:
The number 421 fits into 4053 9 times, leaving a remainder of 264.
Write down 9 as next digit of the result. 
Result so far: 19.0
Subtract 3789 from 4053 to get 264.
Take the next digit (9) from the dividend and append it to 264, then repeat: 2649 / 421

On to step 5:
If we divide 2649 by 421, we get 6 and a remainder of 123.
The number 6 becomes the next digit in our result. 
Result so far: 196.0
Subtract 2526 from 2649 to get 123.
Include the next digit (7) from the dividend after 123, then repeat: 1237 / 421

Moving on to step 6:
421 can be fit into 1237 2 times, resulting in a remainder of 395.
Use 2 as the next digit of our solution. 
Result so far: 1962.0
Subtracting 842 from 1237 leaves us with 395.
Include the next digit (2) from the dividend after 395, then repeat: 3952 / 421

Let's proceed to step 7:
3952 divided by 421 is 9 with a remainder of 163.
The number 9 becomes the next digit in our result. 
Result so far: 19629.0
Deduct 3789 from 3952 and we're left with 163.
Fetch the next digit (4) from the dividend, attach it to 163 and continue: 1634 / 421

Going ahead to step 8:
When dividing 1634 by 421, we get 3 with a remainder of 371.
Put 3 as the next digit of the answer. 
Result so far: 196293.0
Subtracting 1263 from 1634 leaves us with 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Advancing to step 9:
421 can be fit into 3710 8 times, resulting in a remainder of 342.
Put 8 as the next digit of the answer. 
Result so far: 196293.8
If we take 3368 away from 3710, we end up with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Moving on to step 10:
421 goes into 3420 8 times with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 196293.88
The remainder is 52 after subtracting 3368 from 3420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final result is 196293.88 with a remainder of 0.052.