We're dividing 52530438 by 21 
We want to divide 52530438 by 21.

Moving on to step 1:
21 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 21

On to step 2:
If we divide 52 by 21, we get 2 and a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 42 from 52, we get 10.
Grab the next digit (5) from the dividend, add it to 10, then carry on: 105 / 21

On to step 3:
The number 21 fits into 105 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we subtract 105 from 105, we get 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 21

Advancing to step 4:
21 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 250.0
Subtract 0 from 3 to get 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 21

Step 5:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 2501.0
Deduct 21 from 30 and we're left with 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 21

Advancing to step 6:
21 can be fit into 94 4 times, resulting in a remainder of 10.
The next digit of our result is 4. 
Result so far: 25014.0
Deduct 84 from 94 and we're left with 10.
Take the next digit (3) from the dividend and append it to 10, then repeat: 103 / 21

Step 7:
21 can be fit into 103 4 times, resulting in a remainder of 19.
Put 4 as the next digit of the answer. 
Result so far: 250144.0
Subtracting 84 from 103 leaves us with 19.
Include the next digit (8) from the dividend after 19, then repeat: 198 / 21

Advancing to step 8:
198 divided by 21 is 9 with a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 2501449.0
The remainder is 9 after subtracting 189 from 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
If we divide 90 by 21, we get 4 and a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 2501449.4
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 10:
If we divide 60 by 21, we get 2 and a remainder of 18.
The next digit of our result is 2. 
Result so far: 2501449.42
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 11:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 2501449.428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 2501449.4285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 13:
If we divide 150 by 21, we get 7 and a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 2501449.42857
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 14:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 2501449.428571
Subtracting 21 from 30 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 15:
If we divide 90 by 21, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 2501449.4285714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 16:
If we divide 60 by 21, we get 2 and a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 2501449.42857142
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

In conclusion, the division gives 2501449.42857142 with a balance of 1.8e-08.