We look at the division of 870353 by 90 
We want to divide 870353 by 90.

Advancing to step 1:
90 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 90

Going ahead 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
Deduct 0 from 87 and we're left with 87.
Fetch the next digit (0) from the dividend, attach it to 87 and continue: 870 / 90

Step 3:
The number 90 fits into 870 9 times, leaving a remainder of 60.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 810 away from 870, we end up with 60.
Bring next digit (3) of the dividend behind the 60 and repeat the process: 603 / 90

Advancing to step 4:
90 can be fit into 603 6 times, resulting in a remainder of 63.
The next digit of our result is 6. 
Result so far: 96.0
Subtract 540 from 603 to get 63.
Bring next digit (5) of the dividend behind the 63 and repeat the process: 635 / 90

On to step 5:
90 can be fit into 635 7 times, resulting in a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 967.0
Deduct 630 from 635 and we're left with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 90

Step 6:
When dividing 53 by 90, we get 0 with a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 9670.0
If we subtract 0 from 53, we get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 7:
When dividing 530 by 90, we get 5 with a remainder of 80.
Write down 5 as next digit of the result. 
Result so far: 9670.5
The remainder is 80 after subtracting 450 from 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 8:
If we divide 800 by 90, we get 8 and a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 9670.58
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 9:
800 divided by 90 is 8 with a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 9670.588
Deduct 720 from 800 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

After the division, we end up with 9670.588 and a remainder of 0.008.