We're dividing 819391 by 90 
We want to divide 819391 by 90.

Let's proceed to step 1:
90 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 90

Going ahead to step 2:
When dividing 81 by 90, we get 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Bring next digit (9) of the dividend behind the 81 and repeat the process: 819 / 90

Moving on to step 3:
90 can be fit into 819 9 times, resulting in a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 810 from 819, we get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 90

On to step 4:
If we divide 93 by 90, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 91.0
Subtracting 90 from 93 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 90

On to step 5:
If we divide 39 by 90, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 910.0
Deduct 0 from 39 and we're left with 39.
Fetch the next digit (1) from the dividend, attach it to 39 and continue: 391 / 90

Advancing to step 6:
The number 90 fits into 391 4 times, leaving a remainder of 31.
Use 4 as the next digit of our solution. 
Result so far: 9104.0
Subtract 360 from 391 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.

Going ahead to step 7:
If we divide 310 by 90, we get 3 and a remainder of 40.
Record the quotient 3 as the next digit in the result. 
Result so far: 9104.3
The remainder is 40 after subtracting 270 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 8:
90 goes into 400 4 times with a remainder of 40.
The next digit of our result is 4. 
Result so far: 9104.34
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
If we divide 400 by 90, we get 4 and a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 9104.344
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.

Our division results in 9104.344 with a remaining 0.004.