Let's divide 898439 by 21
We're looking to find how many times 21 goes into 898439.

Moving on to step 1:
When dividing 8 by 21, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 21

Going ahead to step 2:
When dividing 89 by 21, we get 4 with a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 84 from 89 and we're left with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 21

Advancing to step 3:
If we divide 58 by 21, we get 2 and a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 42.0
If we take 42 away from 58, we end up with 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 21

Let's proceed to step 4:
21 can be fit into 164 7 times, resulting in a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 427.0
The remainder is 17 after subtracting 147 from 164.
Grab the next digit (3) from the dividend, add it to 17, then carry on: 173 / 21

Let's proceed to step 5:
21 can be fit into 173 8 times, resulting in a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 4278.0
If we take 168 away from 173, we end up with 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 21

Going ahead to step 6:
When dividing 59 by 21, we get 2 with a remainder of 17.
The next digit of our result is 2. 
Result so far: 42782.0
The remainder is 17 after subtracting 42 from 59.
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:
When dividing 170 by 21, we get 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 42782.8
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:
If we divide 20 by 21, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 42782.8
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.

Going ahead to step 9:
When dividing 200 by 21, we get 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 42782.809
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.

Let's proceed to step 10:
If we divide 110 by 21, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 42782.8095
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.

Let's proceed 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: 42782.80952
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 12:
80 divided by 21 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 42782.809523
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.

On to step 13:
21 goes into 170 8 times with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 42782.8095238
If we take 168 away from 170, we end up 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.

On to step 14:
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: 42782.8095238
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.

The final result is 42782.8095238 with a remainder of 2e-08.