We look at the division of 488209 by 90 
We want to figure out the number of times 488209 can be divided by 90.

Advancing to step 1:
4 divided by 90 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 90

Let's proceed to step 2:
If we divide 48 by 90, we get 0 and a remainder of 48.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 48, we get 48.
Take the next digit (8) from the dividend and append it to 48, then repeat: 488 / 90

On to step 3:
488 divided by 90 is 5 with a remainder of 38.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 450 from 488 and we're left with 38.
Fetch the next digit (2) from the dividend, attach it to 38 and continue: 382 / 90

Advancing to step 4:
90 goes into 382 4 times with a remainder of 22.
Write down 4 as next digit of the result. 
Result so far: 54.0
Subtract 360 from 382 to get 22.
Include the next digit (0) from the dividend after 22, then repeat: 220 / 90

Advancing to step 5:
The number 90 fits into 220 2 times, leaving a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 542.0
The remainder is 40 after subtracting 180 from 220.
Fetch the next digit (9) from the dividend, attach it to 40 and continue: 409 / 90

Let's proceed to step 6:
When dividing 409 by 90, we get 4 with a remainder of 49.
The next digit of our result is 4. 
Result so far: 5424.0
The remainder is 49 after subtracting 360 from 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 7:
90 can be fit into 490 5 times, resulting in a remainder of 40.
Write down 5 as next digit of the result. 
Result so far: 5424.5
If we take 450 away from 490, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
90 goes into 400 4 times with a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 5424.54
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
The number 90 fits into 400 4 times, leaving a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 5424.544
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 5424.544 and a remainder of 0.004.