We're dividing 488444 by 21 
We want to divide 488444 by 21.

On to step 1:
21 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 21

Advancing to step 2:
21 can be fit into 48 2 times, resulting in a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 42 away from 48, we end up with 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 21

Advancing to step 3:
When dividing 68 by 21, we get 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 23.0
Deduct 63 from 68 and we're left with 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 21

Let's proceed to step 4:
If we divide 54 by 21, we get 2 and a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 232.0
If we take 42 away from 54, we end up with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 21

Moving on to step 5:
If we divide 124 by 21, we get 5 and a remainder of 19.
Put 5 as the next digit of the answer. 
Result so far: 2325.0
If we subtract 105 from 124, we get 19.
Fetch the next digit (4) from the dividend, attach it to 19 and continue: 194 / 21

Advancing to step 6:
If we divide 194 by 21, we get 9 and a remainder of 5.
The next digit of our result is 9. 
Result so far: 23259.0
The remainder is 5 after subtracting 189 from 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
21 goes into 50 2 times with a remainder of 8.
The next digit of our result is 2. 
Result so far: 23259.2
Subtract 42 from 50 to get 8.
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 8:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 23259.23
Subtracting 63 from 80 leaves us 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.

Step 9:
If we divide 170 by 21, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 23259.238
Subtract 168 from 170 to 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.

Moving on to step 10:
If we divide 20 by 21, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 23259.238
Subtract 0 from 20 to 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.

On to step 11:
If we divide 200 by 21, we get 9 and a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 23259.23809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 12:
110 divided by 21 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 23259.238095
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.

Moving on to step 13:
21 goes into 50 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 23259.2380952
Deduct 42 from 50 and we're left 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 14:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 23259.23809523
Deduct 63 from 80 and we're left 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.

The final outcome is 23259.23809523, with a leftover of 1.7e-08.