We look at the division of 810031 by 90 
We want to divide 810031 by 90.

Step 1:
8 divided by 90 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 90

On to step 2:
If we divide 81 by 90, we get 0 and a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Bring next digit (0) of the dividend behind the 81 and repeat the process: 810 / 90

Step 3:
810 divided by 90 is 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 810 from 810 and we're left with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 90

Advancing to step 4:
When dividing 0 by 90, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 90.0
Subtracting 0 from 0 leaves us with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 90

Going ahead to step 5:
When dividing 3 by 90, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 900.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 90

Step 6:
If we divide 31 by 90, we get 0 and a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 9000.0
Subtract 0 from 31 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 7:
The number 90 fits into 310 3 times, leaving a remainder of 40.
The next digit of our result is 3. 
Result so far: 9000.3
Deduct 270 from 310 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 9000.34
If we take 360 away from 400, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 9:
The number 90 fits into 400 4 times, leaving a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 9000.344
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The quotient of the division is 9000.344, and the remainder is 0.004.