287585 ÷ 90 
We're looking to find how many times 90 goes into 287585.

Going ahead to step 1:
The number 90 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 90

Moving on to step 2:
90 can be fit into 28 0 times, resulting in a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 28 after subtracting 0 from 28.
Append the next digit (7) from the dividend to 28 and continue with: 287 / 90

Moving on to step 3:
90 can be fit into 287 3 times, resulting in a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 17 after subtracting 270 from 287.
Include the next digit (5) from the dividend after 17, then repeat: 175 / 90

Advancing to step 4:
The number 90 fits into 175 1 times, leaving a remainder of 85.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
Deduct 90 from 175 and we're left with 85.
Take the next digit (8) from the dividend and append it to 85, then repeat: 858 / 90

Going ahead to step 5:
When dividing 858 by 90, we get 9 with a remainder of 48.
Record the quotient 9 as the next digit in the result. 
Result so far: 319.0
The remainder is 48 after subtracting 810 from 858.
Fetch the next digit (5) from the dividend, attach it to 48 and continue: 485 / 90

Let's proceed to step 6:
If we divide 485 by 90, we get 5 and a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 3195.0
The remainder is 35 after subtracting 450 from 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 7:
The number 90 fits into 350 3 times, leaving a remainder of 80.
Use 3 as the next digit of our solution. 
Result so far: 3195.3
Subtract 270 from 350 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
90 goes into 800 8 times with a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 3195.38
The remainder is 80 after subtracting 720 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 9:
800 divided by 90 is 8 with a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 3195.388
Subtract 720 from 800 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final outcome is 3195.388, with a leftover of 0.008.