We look at the division of 844228 by 21 
Our goal is to divide 844228 by 21.

Let's proceed to step 1:
21 can be fit into 8 0 times, resulting in 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 (4) of the dividend behind the 8 and repeat the process: 84 / 21

Let's proceed to step 2:
The number 21 fits into 84 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
If we take 84 away from 84, we end up with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 21

Advancing to step 3:
When dividing 4 by 21, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 40.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 21

Going ahead to step 4:
The number 21 fits into 42 2 times, leaving a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 402.0
If we take 42 away from 42, we end up with 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 21

On to step 5:
21 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 4020.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 21

Advancing to step 6:
If we divide 28 by 21, we get 1 and a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 40201.0
If we take 21 away from 28, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
21 goes into 70 3 times with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 40201.3
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 8:
The number 21 fits into 70 3 times, leaving a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 40201.33
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 40201.33 and a remainder of 0.007.