We're dividing 571884 by 21 
We're looking to find how many times 21 goes into 571884.

Step 1:
21 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 21

Going ahead to step 2:
21 can be fit into 57 2 times, resulting in a remainder of 15.
The next digit of our result is 2. 
Result so far: 2.0
If we take 42 away from 57, we end up with 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 21

Moving on to step 3:
21 goes into 151 7 times with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 27.0
Subtracting 147 from 151 leaves us with 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 21

Step 4:
48 divided by 21 is 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 272.0
If we take 42 away from 48, we end up with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 21

Moving on to step 5:
When dividing 68 by 21, we get 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 2723.0
Subtract 63 from 68 to get 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 21

Going ahead to step 6:
54 divided by 21 is 2 with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 27232.0
If we take 42 away from 54, 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.

Advancing to step 7:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 27232.5
Deduct 105 from 120 and we're left 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.

On to step 8:
21 goes into 150 7 times with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 27232.57
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.

Step 9:
When dividing 30 by 21, we get 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 27232.571
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.

Going ahead to step 10:
When dividing 90 by 21, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 27232.5714
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 11:
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: 27232.57142
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.

Advancing to step 12:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 27232.571428
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.

On to step 13:
When dividing 120 by 21, we get 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 27232.5714285
Deduct 105 from 120 and we're left 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.

On to step 14:
If we divide 150 by 21, we get 7 and a remainder of 3.
The next digit of our result is 7. 
Result so far: 27232.57142857
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final outcome is 27232.57142857, with a leftover of 3e-09.