We look at the division of 897724 by 21 
We're looking to find how many times 21 goes into 897724.

Moving on to step 1:
21 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 21

Advancing to step 2:
89 divided by 21 is 4 with a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 84 from 89 leaves us with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 21

On to step 3:
If we divide 57 by 21, we get 2 and a remainder of 15.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Deduct 42 from 57 and we're left with 15.
Fetch the next digit (7) from the dividend, attach it to 15 and continue: 157 / 21

Step 4:
If we divide 157 by 21, we get 7 and a remainder of 10.
The next digit of our result is 7. 
Result so far: 427.0
Subtract 147 from 157 to get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 21

Going ahead to step 5:
The number 21 fits into 102 4 times, leaving a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 4274.0
Subtract 84 from 102 to get 18.
Grab the next digit (4) from the dividend, add it to 18, then carry on: 184 / 21

Step 6:
184 divided by 21 is 8 with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 42748.0
Subtracting 168 from 184 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 7:
If we divide 160 by 21, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 42748.7
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 8:
21 goes into 130 6 times with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 42748.76
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
If we divide 40 by 21, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 42748.761
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 10:
190 divided by 21 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 42748.7619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 11:
21 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 42748.7619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
100 divided by 21 is 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 42748.761904
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 42748.7619047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 14:
21 goes into 130 6 times with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 42748.76190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 42748.76190476 and a remainder of 4e-09.