866680 ÷ 80 
We're looking to find how many times 80 goes into 866680.

Advancing to step 1:
80 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 80

On to step 2:
If we divide 86 by 80, we get 1 and a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 80 from 86, we get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 80

On to step 3:
The number 80 fits into 66 0 times, leaving a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 66, we get 66.
Grab the next digit (6) from the dividend, add it to 66, then carry on: 666 / 80

Let's proceed to step 4:
The number 80 fits into 666 8 times, leaving a remainder of 26.
The next digit of our result is 8. 
Result so far: 108.0
If we take 640 away from 666, we end up with 26.
Take the next digit (8) from the dividend and append it to 26, then repeat: 268 / 80

Step 5:
The number 80 fits into 268 3 times, leaving a remainder of 28.
The next digit of our result is 3. 
Result so far: 1083.0
The remainder is 28 after subtracting 240 from 268.
Fetch the next digit (0) from the dividend, attach it to 28 and continue: 280 / 80

Let's proceed to step 6:
80 goes into 280 3 times with a remainder of 40.
Put 3 as the next digit of the answer. 
Result so far: 10833.0
If we subtract 240 from 280, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 7:
400 divided by 80 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 10833.5
Deduct 400 from 400 and we're left 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.

Moving on to step 8:
0 divided by 80 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10833.5
If we subtract 0 from 0, we get 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 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10833.5
Deduct 0 from 0 and we're left 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.

The final outcome is 10833.5, with a leftover of 0.0.