We look at the division of 193724 by 21 
Let's see how many times 21 fits into 193724.

Moving on to step 1:
The number 21 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 21

Step 2:
If we divide 19 by 21, we get 0 and a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 19 leaves us with 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 21

Step 3:
If we divide 193 by 21, we get 9 and a remainder of 4.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
The remainder is 4 after subtracting 189 from 193.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 21

On to step 4:
The number 21 fits into 47 2 times, leaving a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
Subtract 42 from 47 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 21

Moving on to step 5:
If we divide 52 by 21, we get 2 and a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 922.0
Deduct 42 from 52 and we're left with 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 21

Moving on to step 6:
If we divide 104 by 21, we get 4 and a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 9224.0
Deduct 84 from 104 and we're left 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.

Going ahead to step 7:
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: 9224.9
Deduct 189 from 200 and we're left 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 8:
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: 9224.95
Subtract 105 from 110 to 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 9:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 9224.952
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 10:
21 can be fit into 80 3 times, resulting in a remainder of 17.
The next digit of our result is 3. 
Result so far: 9224.9523
Subtracting 63 from 80 leaves us 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 11:
If we divide 170 by 21, we get 8 and a remainder of 2.
The next digit of our result is 8. 
Result so far: 9224.95238
Subtract 168 from 170 to 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.

Moving on to step 12:
When dividing 20 by 21, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 9224.95238
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.

Going ahead to step 13:
21 goes into 200 9 times with a remainder of 11.
The next digit of our result is 9. 
Result so far: 9224.9523809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 14:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 9224.95238095
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.

After the division, we end up with 9224.95238095 and a remainder of 5e-09.