We look at the division of 448575 by 90 
We want to divide 448575 by 90.

Step 1:
90 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 90

Let's proceed to step 2:
The number 90 fits into 44 0 times, leaving a remainder of 44.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 44 after subtracting 0 from 44.
Take the next digit (8) from the dividend and append it to 44, then repeat: 448 / 90

Going ahead to step 3:
90 goes into 448 4 times with a remainder of 88.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 360 from 448, we get 88.
Include the next digit (5) from the dividend after 88, then repeat: 885 / 90

On to step 4:
When dividing 885 by 90, we get 9 with a remainder of 75.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
Subtracting 810 from 885 leaves us with 75.
Take the next digit (7) from the dividend and append it to 75, then repeat: 757 / 90

Moving on to step 5:
90 goes into 757 8 times with a remainder of 37.
Record the quotient 8 as the next digit in the result. 
Result so far: 498.0
Deduct 720 from 757 and we're left with 37.
Take the next digit (5) from the dividend and append it to 37, then repeat: 375 / 90

Step 6:
375 divided by 90 is 4 with a remainder of 15.
The next digit of our result is 4. 
Result so far: 4984.0
Subtracting 360 from 375 leaves us 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.

Going ahead to step 7:
150 divided by 90 is 1 with a remainder of 60.
Put 1 as the next digit of the answer. 
Result so far: 4984.1
Deduct 90 from 150 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
600 divided by 90 is 6 with a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 4984.16
Subtracting 540 from 600 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
If we divide 600 by 90, we get 6 and a remainder of 60.
The next digit of our result is 6. 
Result so far: 4984.166
Subtract 540 from 600 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

After the division, we end up with 4984.166 and a remainder of 0.006.