We look at the division of 587253 by 21 
Our goal is to divide 587253 by 21.

Let's proceed to step 1:
If we divide 5 by 21, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 21

Going ahead to step 2:
21 goes into 58 2 times with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 42 away from 58, we end up with 16.
Fetch the next digit (7) from the dividend, attach it to 16 and continue: 167 / 21

Moving on to step 3:
21 can be fit into 167 7 times, resulting in a remainder of 20.
The next digit of our result is 7. 
Result so far: 27.0
Subtracting 147 from 167 leaves us with 20.
Append the next digit (2) from the dividend to 20 and continue with: 202 / 21

Moving on to step 4:
The number 21 fits into 202 9 times, leaving a remainder of 13.
Use 9 as the next digit of our solution. 
Result so far: 279.0
Subtract 189 from 202 to get 13.
Include the next digit (5) from the dividend after 13, then repeat: 135 / 21

Step 5:
21 goes into 135 6 times with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 2796.0
If we take 126 away from 135, we end up with 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 21

On to step 6:
The number 21 fits into 93 4 times, leaving a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 27964.0
If we take 84 away from 93, we end up 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.

Advancing to step 7:
21 goes into 90 4 times with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 27964.4
Subtracting 84 from 90 leaves us 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.

Step 8:
21 goes into 60 2 times with a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 27964.42
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 9:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 27964.428
Deduct 168 from 180 and we're left 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.

Advancing to step 10:
21 can be fit into 120 5 times, resulting in a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 27964.4285
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 11:
When dividing 150 by 21, we get 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 27964.42857
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 12:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 27964.428571
If we take 21 away from 30, we end up 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.

Going ahead to step 13:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 27964.4285714
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.

Advancing to step 14:
If we divide 60 by 21, we get 2 and a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 27964.42857142
Deduct 42 from 60 and we're left 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 27964.42857142 with a balance of 1.8e-08.