We divide 801257 by 90
We're looking to find how many times 90 goes into 801257.

Step 1:
When dividing 8 by 90, we get 0 with 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.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 90

Step 2:
80 divided by 90 is 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Grab the next digit (1) from the dividend, add it to 80, then carry on: 801 / 90

Step 3:
90 goes into 801 8 times with a remainder of 81.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 720 from 801 leaves us with 81.
Take the next digit (2) from the dividend and append it to 81, then repeat: 812 / 90

Advancing to step 4:
If we divide 812 by 90, we get 9 and a remainder of 2.
The next digit of our result is 9. 
Result so far: 89.0
Subtracting 810 from 812 leaves us with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 90

On to step 5:
When dividing 25 by 90, we get 0 with a remainder of 25.
The next digit of our result is 0. 
Result so far: 890.0
If we take 0 away from 25, we end up with 25.
Append the next digit (7) from the dividend to 25 and continue with: 257 / 90

On to step 6:
90 can be fit into 257 2 times, resulting in a remainder of 77.
Write down 2 as next digit of the result. 
Result so far: 8902.0
Subtract 180 from 257 to get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 7:
770 divided by 90 is 8 with a remainder of 50.
The next digit of our result is 8. 
Result so far: 8902.8
The remainder is 50 after subtracting 720 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
If we divide 500 by 90, we get 5 and a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 8902.85
If we take 450 away from 500, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 9:
If we divide 500 by 90, we get 5 and a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 8902.855
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 8902.855 and a remainder of 0.005.