21710339 ÷ 488 
Our goal is to divide 21710339 by 488.

Advancing to step 1:
When dividing 2 by 488, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 488

On to step 2:
If we divide 21 by 488, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Take the next digit (7) from the dividend and append it to 21, then repeat: 217 / 488

Moving on to step 3:
The number 488 fits into 217 0 times, leaving a remainder of 217.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 217 to get 217.
Take the next digit (1) from the dividend and append it to 217, then repeat: 2171 / 488

Step 4:
The number 488 fits into 2171 4 times, leaving a remainder of 219.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 1952 from 2171 to get 219.
Fetch the next digit (0) from the dividend, attach it to 219 and continue: 2190 / 488

Moving on to step 5:
488 can be fit into 2190 4 times, resulting in a remainder of 238.
Write down 4 as next digit of the result. 
Result so far: 44.0
Subtract 1952 from 2190 to get 238.
Take the next digit (3) from the dividend and append it to 238, then repeat: 2383 / 488

Let's proceed to step 6:
When dividing 2383 by 488, we get 4 with a remainder of 431.
The number 4 becomes the next digit in our result. 
Result so far: 444.0
If we subtract 1952 from 2383, we get 431.
Grab the next digit (3) from the dividend, add it to 431, then carry on: 4313 / 488

Advancing to step 7:
If we divide 4313 by 488, we get 8 and a remainder of 409.
The next digit of our result is 8. 
Result so far: 4448.0
If we take 3904 away from 4313, we end up with 409.
Fetch the next digit (9) from the dividend, attach it to 409 and continue: 4099 / 488

Let's proceed to step 8:
The number 488 fits into 4099 8 times, leaving a remainder of 195.
The number 8 becomes the next digit in our result. 
Result so far: 44488.0
Deduct 3904 from 4099 and we're left with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Step 9:
488 goes into 1950 3 times with a remainder of 486.
The next digit of our result is 3. 
Result so far: 44488.3
If we take 1464 away from 1950, we end up with 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

Let's proceed to step 10:
488 goes into 4860 9 times with a remainder of 468.
Write down 9 as next digit of the result. 
Result so far: 44488.39
If we subtract 4392 from 4860, we get 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Moving on to step 11:
488 can be fit into 4680 9 times, resulting in a remainder of 288.
The next digit of our result is 9. 
Result so far: 44488.399
The remainder is 288 after subtracting 4392 from 4680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

The final result is 44488.399 with a remainder of 0.0288.