We look at the division of 86257 by 90 
Let's see how many times 90 fits into 86257.

On to step 1:
The number 90 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 90

Going ahead to step 2:
86 divided by 90 is 0 with a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Fetch the next digit (2) from the dividend, attach it to 86 and continue: 862 / 90

Step 3:
If we divide 862 by 90, we get 9 and a remainder of 52.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 810 from 862 and we're left with 52.
Append the next digit (5) from the dividend to 52 and continue with: 525 / 90

On to step 4:
When dividing 525 by 90, we get 5 with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 95.0
If we subtract 450 from 525, we get 75.
Append the next digit (7) from the dividend to 75 and continue with: 757 / 90

On to step 5:
90 goes into 757 8 times with a remainder of 37.
The next digit of our result is 8. 
Result so far: 958.0
The remainder is 37 after subtracting 720 from 757.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 6:
370 divided by 90 is 4 with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 958.4
Subtracting 360 from 370 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
90 can be fit into 100 1 times, resulting in a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 958.41
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
90 can be fit into 100 1 times, resulting in a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 958.411
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 958.411 with a balance of 0.001.