489555 ÷ 90 
We want to figure out the number of times 489555 can be divided by 90.

Advancing to step 1:
When dividing 4 by 90, we get 0 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.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 90

Moving on to step 2:
48 divided by 90 is 0 with a remainder of 48.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 48, we get 48.
Bring next digit (9) of the dividend behind the 48 and repeat the process: 489 / 90

Let's proceed to step 3:
90 can be fit into 489 5 times, resulting in a remainder of 39.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 39 after subtracting 450 from 489.
Append the next digit (5) from the dividend to 39 and continue with: 395 / 90

Advancing to step 4:
When dividing 395 by 90, we get 4 with a remainder of 35.
Record the quotient 4 as the next digit in the result. 
Result so far: 54.0
Subtracting 360 from 395 leaves us with 35.
Append the next digit (5) from the dividend to 35 and continue with: 355 / 90

On to step 5:
90 goes into 355 3 times with a remainder of 85.
The number 3 becomes the next digit in our result. 
Result so far: 543.0
If we subtract 270 from 355, we get 85.
Include the next digit (5) from the dividend after 85, then repeat: 855 / 90

Going ahead to step 6:
The number 90 fits into 855 9 times, leaving a remainder of 45.
The next digit of our result is 9. 
Result so far: 5439.0
Subtracting 810 from 855 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 7:
When dividing 450 by 90, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 5439.5
Subtract 450 from 450 to get 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:
The number 90 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5439.5
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.

On to step 9:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5439.5
Subtracting 0 from 0 leaves us 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 final result is 5439.5 with a remainder of 0.0.