We look at the division of 928724 by 21 
We're looking to find how many times 21 goes into 928724.

Step 1:
21 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 21

Advancing to step 2:
21 can be fit into 92 4 times, resulting in a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 84 from 92 to get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 21

On to step 3:
The number 21 fits into 88 4 times, leaving a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 44.0
Subtracting 84 from 88 leaves us with 4.
Include the next digit (7) from the dividend after 4, then repeat: 47 / 21

Let's proceed to step 4:
21 goes into 47 2 times with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 442.0
Subtract 42 from 47 to get 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 21

On to step 5:
21 goes into 52 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 4422.0
Deduct 42 from 52 and we're left with 10.
Grab the next digit (4) from the dividend, add it to 10, then carry on: 104 / 21

Advancing to step 6:
21 goes into 104 4 times with a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 44224.0
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.

Let's proceed to step 7:
If we divide 200 by 21, we get 9 and a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 44224.9
If we subtract 189 from 200, we 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.

Step 8:
21 can be fit into 110 5 times, resulting in a remainder of 5.
The next digit of our result is 5. 
Result so far: 44224.95
Deduct 105 from 110 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.

Moving on to step 9:
50 divided by 21 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 44224.952
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.

On to step 10:
80 divided by 21 is 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 44224.9523
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 11:
21 goes into 170 8 times with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 44224.95238
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.

Step 12:
21 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 44224.95238
If we take 0 away from 20, we end up 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.

Moving on to step 13:
200 divided by 21 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 44224.9523809
Subtracting 189 from 200 leaves us 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 14:
21 goes into 110 5 times with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 44224.95238095
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.

Our division results in 44224.95238095 with a remaining 5e-09.