We look at the division of 86502666 by 999 
Let's see how many times 999 fits into 86502666.

Advancing to step 1:
The number 999 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 999

Going ahead to step 2:
When dividing 86 by 999, we get 0 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.
Take the next digit (5) from the dividend and append it to 86, then repeat: 865 / 999

Moving on to step 3:
865 divided by 999 is 0 with a remainder of 865.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 865 to get 865.
Bring next digit (0) of the dividend behind the 865 and repeat the process: 8650 / 999

Let's proceed to step 4:
When dividing 8650 by 999, we get 8 with a remainder of 658.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 7992 from 8650 to get 658.
Bring next digit (2) of the dividend behind the 658 and repeat the process: 6582 / 999

Let's proceed to step 5:
999 can be fit into 6582 6 times, resulting in a remainder of 588.
Put 6 as the next digit of the answer. 
Result so far: 86.0
If we subtract 5994 from 6582, we get 588.
Append the next digit (6) from the dividend to 588 and continue with: 5886 / 999

Let's proceed to step 6:
999 goes into 5886 5 times with a remainder of 891.
The next digit of our result is 5. 
Result so far: 865.0
The remainder is 891 after subtracting 4995 from 5886.
Append the next digit (6) from the dividend to 891 and continue with: 8916 / 999

Moving on to step 7:
If we divide 8916 by 999, we get 8 and a remainder of 924.
Record the quotient 8 as the next digit in the result. 
Result so far: 8658.0
If we take 7992 away from 8916, we end up with 924.
Grab the next digit (6) from the dividend, add it to 924, then carry on: 9246 / 999

On to step 8:
The number 999 fits into 9246 9 times, leaving a remainder of 255.
Put 9 as the next digit of the answer. 
Result so far: 86589.0
Subtracting 8991 from 9246 leaves us with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Step 9:
2550 divided by 999 is 2 with a remainder of 552.
Use 2 as the next digit of our solution. 
Result so far: 86589.2
If we subtract 1998 from 2550, we get 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Moving on to step 10:
5520 divided by 999 is 5 with a remainder of 525.
Write down 5 as next digit of the result. 
Result so far: 86589.25
Deduct 4995 from 5520 and we're left with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

On to step 11:
If we divide 5250 by 999, we get 5 and a remainder of 255.
Put 5 as the next digit of the answer. 
Result so far: 86589.255
Subtracting 4995 from 5250 leaves us with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Our division results in 86589.255 with a remaining 0.0255.