81559880 ÷ 866 
We want to divide 81559880 by 866.

Step 1:
8 divided by 866 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 866

Step 2:
866 can be fit into 81 0 times, resulting in a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Include the next digit (5) from the dividend after 81, then repeat: 815 / 866

Step 3:
815 divided by 866 is 0 with a remainder of 815.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 815 leaves us with 815.
Grab the next digit (5) from the dividend, add it to 815, then carry on: 8155 / 866

Advancing to step 4:
8155 divided by 866 is 9 with a remainder of 361.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 7794 from 8155 and we're left with 361.
Fetch the next digit (9) from the dividend, attach it to 361 and continue: 3619 / 866

Going ahead to step 5:
The number 866 fits into 3619 4 times, leaving a remainder of 155.
Use 4 as the next digit of our solution. 
Result so far: 94.0
If we take 3464 away from 3619, we end up with 155.
Include the next digit (8) from the dividend after 155, then repeat: 1558 / 866

Going ahead to step 6:
866 goes into 1558 1 times with a remainder of 692.
Record the quotient 1 as the next digit in the result. 
Result so far: 941.0
Subtract 866 from 1558 to get 692.
Bring next digit (8) of the dividend behind the 692 and repeat the process: 6928 / 866

Step 7:
6928 divided by 866 is 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 9418.0
Subtracting 6928 from 6928 leaves us with 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 866

Advancing to step 8:
866 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 94180.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
If we divide 0 by 866, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 94180.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
866 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 94180.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 94180.0, with a leftover of 0.0.