86803315 ÷ 866 
We're looking to find how many times 866 goes into 86803315.

On to step 1:
866 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 866

Moving on to step 2:
When dividing 86 by 866, we get 0 with a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Append the next digit (8) from the dividend to 86 and continue with: 868 / 866

Step 3:
If we divide 868 by 866, we get 1 and a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 866 from 868 leaves us with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 866

Going ahead to step 4:
When dividing 20 by 866, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 20, we end up with 20.
Append the next digit (3) from the dividend to 20 and continue with: 203 / 866

Step 5:
When dividing 203 by 866, we get 0 with a remainder of 203.
Use 0 as the next digit of our solution. 
Result so far: 100.0
Subtract 0 from 203 to get 203.
Fetch the next digit (3) from the dividend, attach it to 203 and continue: 2033 / 866

Moving on to step 6:
866 can be fit into 2033 2 times, resulting in a remainder of 301.
Write down 2 as next digit of the result. 
Result so far: 1002.0
Subtracting 1732 from 2033 leaves us with 301.
Grab the next digit (1) from the dividend, add it to 301, then carry on: 3011 / 866

Going ahead to step 7:
When dividing 3011 by 866, we get 3 with a remainder of 413.
Write down 3 as next digit of the result. 
Result so far: 10023.0
Deduct 2598 from 3011 and we're left with 413.
Take the next digit (5) from the dividend and append it to 413, then repeat: 4135 / 866

Step 8:
866 goes into 4135 4 times with a remainder of 671.
Write down 4 as next digit of the result. 
Result so far: 100234.0
The remainder is 671 after subtracting 3464 from 4135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6710, and continue the process.

Step 9:
6710 divided by 866 is 7 with a remainder of 648.
Use 7 as the next digit of our solution. 
Result so far: 100234.7
Subtracting 6062 from 6710 leaves us with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Let's proceed to step 10:
The number 866 fits into 6480 7 times, leaving a remainder of 418.
Put 7 as the next digit of the answer. 
Result so far: 100234.77
The remainder is 418 after subtracting 6062 from 6480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

In conclusion, the division gives 100234.77 with a balance of 0.418.