We're dividing 868799 by 90 
Let's see how many times 90 fits into 868799.

On to step 1:
If we divide 8 by 90, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 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.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Fetch the next digit (8) from the dividend, attach it to 86 and continue: 868 / 90

Step 3:
868 divided by 90 is 9 with a remainder of 58.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 810 from 868 leaves us with 58.
Grab the next digit (7) from the dividend, add it to 58, then carry on: 587 / 90

Step 4:
The number 90 fits into 587 6 times, leaving a remainder of 47.
Write down 6 as next digit of the result. 
Result so far: 96.0
Subtracting 540 from 587 leaves us with 47.
Bring next digit (9) of the dividend behind the 47 and repeat the process: 479 / 90

Going ahead to step 5:
479 divided by 90 is 5 with a remainder of 29.
The next digit of our result is 5. 
Result so far: 965.0
Subtract 450 from 479 to get 29.
Include the next digit (9) from the dividend after 29, then repeat: 299 / 90

Going ahead to step 6:
If we divide 299 by 90, we get 3 and a remainder of 29.
Use 3 as the next digit of our solution. 
Result so far: 9653.0
Subtract 270 from 299 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 7:
When dividing 290 by 90, we get 3 with a remainder of 20.
Record the quotient 3 as the next digit in the result. 
Result so far: 9653.3
If we take 270 away from 290, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
The number 90 fits into 200 2 times, leaving a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 9653.32
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
The number 90 fits into 200 2 times, leaving a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 9653.322
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 9653.322 and a remainder of 0.002.