We divide 579233 by 21
We're looking to find how many times 21 goes into 579233.

Let's proceed to step 1:
5 divided by 21 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 21

Step 2:
57 divided by 21 is 2 with a remainder of 15.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 42 away from 57, we end up with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 21

Step 3:
21 can be fit into 159 7 times, resulting in a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 27.0
Deduct 147 from 159 and we're left with 12.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 21

Going ahead to step 4:
The number 21 fits into 122 5 times, leaving a remainder of 17.
Put 5 as the next digit of the answer. 
Result so far: 275.0
Subtracting 105 from 122 leaves us with 17.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 21

On to step 5:
21 goes into 173 8 times with a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 2758.0
Subtract 168 from 173 to get 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 21

On to step 6:
When dividing 53 by 21, we get 2 with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 27582.0
If we take 42 away from 53, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 7:
110 divided by 21 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 27582.5
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
21 can be fit into 50 2 times, resulting in a remainder of 8.
The next digit of our result is 2. 
Result so far: 27582.52
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
80 divided by 21 is 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 27582.523
Deduct 63 from 80 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 10:
21 goes into 170 8 times with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 27582.5238
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 11:
If we divide 20 by 21, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 27582.5238
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
When dividing 200 by 21, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 27582.523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 13:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 27582.5238095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 14:
When dividing 50 by 21, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 27582.52380952
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 27582.52380952 and a remainder of 8e-09.