We divide 590968 by 21
Let's see how many times 21 fits into 590968.

Moving on to step 1:
If we divide 5 by 21, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 21

Let's proceed to step 2:
21 can be fit into 59 2 times, resulting in a remainder of 17.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 42 from 59, we get 17.
Take the next digit (0) from the dividend and append it to 17, then repeat: 170 / 21

Step 3:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The next digit of our result is 8. 
Result so far: 28.0
Deduct 168 from 170 and we're left with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 21

Let's proceed to step 4:
The number 21 fits into 29 1 times, leaving a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 281.0
Subtract 21 from 29 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 21

Advancing to step 5:
21 goes into 86 4 times with a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 2814.0
Deduct 84 from 86 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 21

Moving on to step 6:
21 goes into 28 1 times with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 28141.0
Deduct 21 from 28 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
21 goes into 70 3 times with a remainder of 7.
The next digit of our result is 3. 
Result so far: 28141.3
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 8:
21 goes into 70 3 times with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 28141.33
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 28141.33 and a remainder of 0.007.