We're dividing 530979 by 21 
We want to divide 530979 by 21.

Step 1:
When dividing 5 by 21, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 21

Moving on to step 2:
The number 21 fits into 53 2 times, leaving a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 11 after subtracting 42 from 53.
Append the next digit (0) from the dividend to 11 and continue with: 110 / 21

Let's proceed to step 3:
If we divide 110 by 21, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtract 105 from 110 to get 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 21

Step 4:
The number 21 fits into 59 2 times, leaving a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 252.0
Subtracting 42 from 59 leaves us with 17.
Bring next digit (7) of the dividend behind the 17 and repeat the process: 177 / 21

Let's proceed to step 5:
When dividing 177 by 21, we get 8 with a remainder of 9.
Record the quotient 8 as the next digit in the result. 
Result so far: 2528.0
The remainder is 9 after subtracting 168 from 177.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 21

On to step 6:
21 can be fit into 99 4 times, resulting in a remainder of 15.
The number 4 becomes the next digit in our result. 
Result so far: 25284.0
Subtracting 84 from 99 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 7:
21 goes into 150 7 times with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 25284.7
The remainder is 3 after subtracting 147 from 150.
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 8:
When dividing 30 by 21, we get 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 25284.71
Deduct 21 from 30 and we're left 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.

On to step 9:
When dividing 90 by 21, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 25284.714
Subtract 84 from 90 to 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.

On to step 10:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 25284.7142
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.

Let's proceed to step 11:
21 can be fit into 180 8 times, resulting in a remainder of 12.
The next digit of our result is 8. 
Result so far: 25284.71428
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 12:
21 goes into 120 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 25284.714285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 13:
150 divided by 21 is 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 25284.7142857
Deduct 147 from 150 and we're left 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.

On to step 14:
When dividing 30 by 21, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 25284.71428571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

The final outcome is 25284.71428571, with a leftover of 9e-09.