We look at the division of 593612 by 21 
We're looking to find how many times 21 goes into 593612.

Let's proceed to 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
If we take 0 away from 5, we end up with 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 21

Moving on to step 2:
If we divide 59 by 21, we get 2 and 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.
Append the next digit (3) from the dividend to 17 and continue with: 173 / 21

Advancing to step 3:
21 can be fit into 173 8 times, resulting in a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 28.0
Subtract 168 from 173 to get 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 21

Let's proceed to step 4:
When dividing 56 by 21, we get 2 with a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 282.0
If we take 42 away from 56, we end up with 14.
Fetch the next digit (1) from the dividend, attach it to 14 and continue: 141 / 21

Advancing to step 5:
21 goes into 141 6 times with a remainder of 15.
Write down 6 as next digit of the result. 
Result so far: 2826.0
The remainder is 15 after subtracting 126 from 141.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 21

Moving on to step 6:
If we divide 152 by 21, we get 7 and a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 28267.0
Deduct 147 from 152 and we're left 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.

On to step 7:
21 goes into 50 2 times with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 28267.2
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 28267.23
If we take 63 away from 80, we end up 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.

Let's proceed to step 9:
170 divided by 21 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 28267.238
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
20 divided by 21 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 28267.238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 11:
If we divide 200 by 21, we get 9 and a remainder of 11.
The next digit of our result is 9. 
Result so far: 28267.23809
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.

Let's proceed to step 12:
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: 28267.238095
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.

Step 13:
50 divided by 21 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 28267.2380952
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.

On to step 14:
21 can be fit into 80 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 28267.23809523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final outcome is 28267.23809523, with a leftover of 1.7e-08.