We look at the division of 573073 by 21 
We want to divide 573073 by 21.

Moving on to step 1:
21 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 21

On to step 2:
57 divided by 21 is 2 with a remainder of 15.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 42 from 57 leaves us with 15.
Include the next digit (3) from the dividend after 15, then repeat: 153 / 21

Step 3:
If we divide 153 by 21, we get 7 and a remainder of 6.
The next digit of our result is 7. 
Result so far: 27.0
If we take 147 away from 153, we end up with 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 21

Moving on to step 4:
21 goes into 60 2 times with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 272.0
Subtract 42 from 60 to get 18.
Bring next digit (7) of the dividend behind the 18 and repeat the process: 187 / 21

Going ahead to step 5:
The number 21 fits into 187 8 times, leaving a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 2728.0
Subtract 168 from 187 to get 19.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 21

On to step 6:
21 goes into 193 9 times with a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 27289.0
Subtract 189 from 193 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
21 goes into 40 1 times with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 27289.1
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
The number 21 fits into 190 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 27289.19
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
When dividing 10 by 21, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 27289.19
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 27289.1904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
If we divide 160 by 21, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 27289.19047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 12:
If we divide 130 by 21, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 27289.190476
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 13:
21 can be fit into 40 1 times, resulting in a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 27289.1904761
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 14:
When dividing 190 by 21, we get 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 27289.19047619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The quotient of the division is 27289.19047619, and the remainder is 1e-09.