We look at the division of 323942 by 21 
We want to figure out the number of times 323942 can be divided by 21.

Moving on to step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 21

On to step 2:
The number 21 fits into 32 1 times, leaving a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 21 from 32 and we're left with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 21

Advancing to step 3:
21 goes into 113 5 times with a remainder of 8.
The next digit of our result is 5. 
Result so far: 15.0
If we subtract 105 from 113, we get 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 21

Going ahead to step 4:
The number 21 fits into 89 4 times, leaving a remainder of 5.
The next digit of our result is 4. 
Result so far: 154.0
Deduct 84 from 89 and we're left with 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 21

Step 5:
When dividing 54 by 21, we get 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 1542.0
Deduct 42 from 54 and we're left with 12.
Append the next digit (2) from the dividend to 12 and continue with: 122 / 21

Going ahead to step 6:
If we divide 122 by 21, we get 5 and a remainder of 17.
The next digit of our result is 5. 
Result so far: 15425.0
If we take 105 away from 122, 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.

Step 7:
21 goes into 170 8 times with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 15425.8
If we subtract 168 from 170, we get 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 8:
20 divided by 21 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 15425.8
If we subtract 0 from 20, we 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.

On to step 9:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 15425.809
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.

Step 10:
21 goes into 110 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 15425.8095
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.

On to step 11:
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: 15425.80952
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.

Advancing to step 12:
When dividing 80 by 21, we get 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 15425.809523
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.

Going ahead to step 13:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 15425.8095238
Subtracting 168 from 170 leaves us 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.

Advancing to step 14:
When dividing 20 by 21, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 15425.8095238
If we subtract 0 from 20, we 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.

After the division, we end up with 15425.8095238 and a remainder of 2e-08.