890396 divided by 21 
We're looking to find how many times 21 goes into 890396.

Going ahead to step 1:
21 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 21

Moving on 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
If we take 84 away from 89, we end up with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 21

Moving on to step 3:
If we divide 50 by 21, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 42.0
Subtract 42 from 50 to get 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 21

Moving on to step 4:
21 goes into 83 3 times with a remainder of 20.
Put 3 as the next digit of the answer. 
Result so far: 423.0
If we subtract 63 from 83, we get 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 21

Advancing to step 5:
The number 21 fits into 209 9 times, leaving a remainder of 20.
Write down 9 as next digit of the result. 
Result so far: 4239.0
Subtract 189 from 209 to get 20.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 21

On to step 6:
21 can be fit into 206 9 times, resulting in a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 42399.0
The remainder is 17 after subtracting 189 from 206.
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 7:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 42399.8
Deduct 168 from 170 and we're left 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.

Advancing to step 8:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 42399.8
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.

Moving on to step 9:
200 divided by 21 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 42399.809
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.

On to step 10:
21 goes into 110 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 42399.8095
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.

Step 11:
When dividing 50 by 21, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 42399.80952
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
When dividing 80 by 21, we get 3 with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 42399.809523
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.

Going ahead to step 13:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 42399.8095238
Deduct 168 from 170 and we're left 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.

Advancing to step 14:
If we divide 20 by 21, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 42399.8095238
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.

In conclusion, the division gives 42399.8095238 with a balance of 2e-08.