We're dividing 866640 by 90 
Our goal is to divide 866640 by 90.

Let's proceed to step 1:
90 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 90

Step 2:
90 goes into 86 0 times with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Append the next digit (6) from the dividend to 86 and continue with: 866 / 90

Advancing to step 3:
866 divided by 90 is 9 with a remainder of 56.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 810 away from 866, we end up with 56.
Include the next digit (6) from the dividend after 56, then repeat: 566 / 90

Advancing to step 4:
566 divided by 90 is 6 with a remainder of 26.
Put 6 as the next digit of the answer. 
Result so far: 96.0
Subtracting 540 from 566 leaves us with 26.
Append the next digit (4) from the dividend to 26 and continue with: 264 / 90

Advancing to step 5:
When dividing 264 by 90, we get 2 with a remainder of 84.
Write down 2 as next digit of the result. 
Result so far: 962.0
Subtract 180 from 264 to get 84.
Bring next digit (0) of the dividend behind the 84 and repeat the process: 840 / 90

Going ahead to step 6:
90 can be fit into 840 9 times, resulting in a remainder of 30.
Put 9 as the next digit of the answer. 
Result so far: 9629.0
Subtracting 810 from 840 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
90 goes into 300 3 times with a remainder of 30.
The next digit of our result is 3. 
Result so far: 9629.3
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 9629.33
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The quotient of the division is 9629.33, and the remainder is 0.03.