448587 ÷ 90 
Let's see how many times 90 fits into 448587.

Moving on to step 1:
90 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 subtract 0 from 4, we get 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 90

Step 2:
If we divide 44 by 90, we get 0 and a remainder of 44.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 44 leaves us with 44.
Bring next digit (8) of the dividend behind the 44 and repeat the process: 448 / 90

Advancing to step 3:
448 divided by 90 is 4 with a remainder of 88.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 360 from 448 leaves us with 88.
Fetch the next digit (5) from the dividend, attach it to 88 and continue: 885 / 90

Going ahead to step 4:
90 goes into 885 9 times with a remainder of 75.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
Subtract 810 from 885 to get 75.
Grab the next digit (8) from the dividend, add it to 75, then carry on: 758 / 90

On to step 5:
When dividing 758 by 90, we get 8 with a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 498.0
If we take 720 away from 758, we end up with 38.
Fetch the next digit (7) from the dividend, attach it to 38 and continue: 387 / 90

Let's proceed to step 6:
The number 90 fits into 387 4 times, leaving a remainder of 27.
The next digit of our result is 4. 
Result so far: 4984.0
If we take 360 away from 387, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 7:
If we divide 270 by 90, we get 3 and a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 4984.3
Deduct 270 from 270 and we're left 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.

Step 8:
0 divided by 90 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 4984.3
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4984.3
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 4984.3 with a remainder of 0.0.