We look at the division of 444990 by 21 
We want to figure out the number of times 444990 can be divided by 21.

Going ahead to step 1:
21 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 21

On to step 2:
44 divided by 21 is 2 with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 42 from 44 leaves us with 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 21

Step 3:
When dividing 24 by 21, we get 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Deduct 21 from 24 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 21

Step 4:
The number 21 fits into 39 1 times, leaving a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 211.0
Subtracting 21 from 39 leaves us with 18.
Grab the next digit (9) from the dividend, add it to 18, then carry on: 189 / 21

On to step 5:
When dividing 189 by 21, we get 9 with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 2119.0
Subtract 189 from 189 to get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 21

Going ahead to step 6:
The number 21 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21190.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 21190.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 21190.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 21190.0, and the remainder is 0.0.