We look at the division of 448953 by 21 
Let's see how many times 21 fits into 448953.

On to step 1:
When dividing 4 by 21, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 21

Step 2:
When dividing 44 by 21, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 42 from 44 to get 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 21

Step 3:
When dividing 28 by 21, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we subtract 21 from 28, we get 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 21

Going ahead to step 4:
If we divide 79 by 21, we get 3 and a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 213.0
If we take 63 away from 79, we end up with 16.
Fetch the next digit (5) from the dividend, attach it to 16 and continue: 165 / 21

Let's proceed to step 5:
The number 21 fits into 165 7 times, leaving a remainder of 18.
The number 7 becomes the next digit in our result. 
Result so far: 2137.0
If we take 147 away from 165, we end up with 18.
Include the next digit (3) from the dividend after 18, then repeat: 183 / 21

On to step 6:
21 goes into 183 8 times with a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 21378.0
The remainder is 15 after subtracting 168 from 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
When dividing 150 by 21, we get 7 with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 21378.7
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
If we divide 30 by 21, we get 1 and a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 21378.71
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
The number 21 fits into 90 4 times, leaving a remainder of 6.
The next digit of our result is 4. 
Result so far: 21378.714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 10:
The number 21 fits into 60 2 times, leaving a remainder of 18.
The next digit of our result is 2. 
Result so far: 21378.7142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 11:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 21378.71428
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 12:
120 divided by 21 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 21378.714285
Deduct 105 from 120 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 13:
21 goes into 150 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 21378.7142857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
30 divided by 21 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 21378.71428571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

The quotient of the division is 21378.71428571, and the remainder is 9e-09.