52138425 divided by 821 
We want to figure out the number of times 52138425 can be divided by 821.

On to step 1:
821 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 821

Going ahead to step 2:
821 goes into 52 0 times with a remainder of 52.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 52, we end up with 52.
Bring next digit (1) of the dividend behind the 52 and repeat the process: 521 / 821

Moving on to step 3:
521 divided by 821 is 0 with a remainder of 521.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 521 leaves us with 521.
Fetch the next digit (3) from the dividend, attach it to 521 and continue: 5213 / 821

On to step 4:
If we divide 5213 by 821, we get 6 and a remainder of 287.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 287 after subtracting 4926 from 5213.
Grab the next digit (8) from the dividend, add it to 287, then carry on: 2878 / 821

Moving on to step 5:
When dividing 2878 by 821, we get 3 with a remainder of 415.
The next digit of our result is 3. 
Result so far: 63.0
The remainder is 415 after subtracting 2463 from 2878.
Append the next digit (4) from the dividend to 415 and continue with: 4154 / 821

Step 6:
The number 821 fits into 4154 5 times, leaving a remainder of 49.
The next digit of our result is 5. 
Result so far: 635.0
If we subtract 4105 from 4154, we get 49.
Grab the next digit (2) from the dividend, add it to 49, then carry on: 492 / 821

Advancing to step 7:
821 can be fit into 492 0 times, resulting in a remainder of 492.
The number 0 becomes the next digit in our result. 
Result so far: 6350.0
Deduct 0 from 492 and we're left with 492.
Bring next digit (5) of the dividend behind the 492 and repeat the process: 4925 / 821

Going ahead to step 8:
When dividing 4925 by 821, we get 5 with a remainder of 820.
The next digit of our result is 5. 
Result so far: 63505.0
If we take 4105 away from 4925, we end up with 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8200, and continue the process.

Let's proceed to step 9:
821 can be fit into 8200 9 times, resulting in a remainder of 811.
Use 9 as the next digit of our solution. 
Result so far: 63505.9
If we take 7389 away from 8200, we end up with 811.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8110, and continue the process.

Moving on to step 10:
8110 divided by 821 is 9 with a remainder of 721.
Record the quotient 9 as the next digit in the result. 
Result so far: 63505.99
Subtracting 7389 from 8110 leaves us with 721.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7210, and continue the process.

The final result is 63505.99 with a remainder of 0.721.