We're dividing 870883 by 90 
We want to divide 870883 by 90.

On to step 1:
90 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 90

Moving on to step 2:
The number 90 fits into 87 0 times, leaving a remainder of 87.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 87 to get 87.
Bring next digit (0) of the dividend behind the 87 and repeat the process: 870 / 90

Advancing to step 3:
90 goes into 870 9 times with a remainder of 60.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 810 from 870, we get 60.
Include the next digit (8) from the dividend after 60, then repeat: 608 / 90

On to step 4:
90 can be fit into 608 6 times, resulting in a remainder of 68.
Write down 6 as next digit of the result. 
Result so far: 96.0
If we subtract 540 from 608, we get 68.
Append the next digit (8) from the dividend to 68 and continue with: 688 / 90

Advancing to step 5:
If we divide 688 by 90, we get 7 and a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 967.0
Deduct 630 from 688 and we're left with 58.
Fetch the next digit (3) from the dividend, attach it to 58 and continue: 583 / 90

Moving on to step 6:
When dividing 583 by 90, we get 6 with a remainder of 43.
The next digit of our result is 6. 
Result so far: 9676.0
If we subtract 540 from 583, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 7:
90 goes into 430 4 times with a remainder of 70.
The number 4 becomes the next digit in our result. 
Result so far: 9676.4
Deduct 360 from 430 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
700 divided by 90 is 7 with a remainder of 70.
The next digit of our result is 7. 
Result so far: 9676.47
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 9:
If we divide 700 by 90, we get 7 and a remainder of 70.
The next digit of our result is 7. 
Result so far: 9676.477
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Our division results in 9676.477 with a remaining 0.007.