897391 ÷ 21 
Our goal is to divide 897391 by 21.

Moving on to step 1:
The number 21 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 21

Step 2:
21 goes into 89 4 times with a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 84 away from 89, we end up with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 21

Let's proceed to step 3:
The number 21 fits into 57 2 times, leaving a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 42.0
If we take 42 away from 57, we end up with 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 21

Advancing to step 4:
If we divide 153 by 21, we get 7 and a remainder of 6.
The next digit of our result is 7. 
Result so far: 427.0
The remainder is 6 after subtracting 147 from 153.
Include the next digit (9) from the dividend after 6, then repeat: 69 / 21

Going ahead to step 5:
When dividing 69 by 21, we get 3 with a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 4273.0
Deduct 63 from 69 and we're left with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 21

On to step 6:
When dividing 61 by 21, we get 2 with a remainder of 19.
Use 2 as the next digit of our solution. 
Result so far: 42732.0
If we take 42 away from 61, 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.

Let's proceed to step 7:
190 divided by 21 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 42732.9
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 8:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 42732.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 42732.904
Subtracting 84 from 100 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.

Going ahead to step 10:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The next digit of our result is 7. 
Result so far: 42732.9047
If we take 147 away from 160, we end up 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.

Step 11:
21 goes into 130 6 times with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 42732.90476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
21 goes into 40 1 times with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 42732.904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 13:
21 goes into 190 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 42732.9047619
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 14:
When dividing 10 by 21, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 42732.9047619
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 42732.9047619 with a remainder of 1e-08.