285207 ÷ 90 
Our goal is to divide 285207 by 90.

Let's proceed to step 1:
If we divide 2 by 90, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 90

Moving on to step 2:
If we divide 28 by 90, we get 0 and a remainder of 28.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Include the next digit (5) from the dividend after 28, then repeat: 285 / 90

Moving on to step 3:
If we divide 285 by 90, we get 3 and a remainder of 15.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 15 after subtracting 270 from 285.
Include the next digit (2) from the dividend after 15, then repeat: 152 / 90

Going ahead to step 4:
90 can be fit into 152 1 times, resulting in a remainder of 62.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
Subtract 90 from 152 to get 62.
Take the next digit (0) from the dividend and append it to 62, then repeat: 620 / 90

Going ahead to step 5:
When dividing 620 by 90, we get 6 with a remainder of 80.
The number 6 becomes the next digit in our result. 
Result so far: 316.0
If we take 540 away from 620, we end up with 80.
Take the next digit (7) from the dividend and append it to 80, then repeat: 807 / 90

On to step 6:
807 divided by 90 is 8 with a remainder of 87.
Record the quotient 8 as the next digit in the result. 
Result so far: 3168.0
If we take 720 away from 807, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 7:
The number 90 fits into 870 9 times, leaving a remainder of 60.
Use 9 as the next digit of our solution. 
Result so far: 3168.9
The remainder is 60 after subtracting 810 from 870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
If we divide 600 by 90, we get 6 and a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 3168.96
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.

On to step 9:
When dividing 600 by 90, we get 6 with a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 3168.966
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.

The final outcome is 3168.966, with a leftover of 0.006.