865912 ÷ 80 
We're looking to find how many times 80 goes into 865912.

Let's proceed to step 1:
80 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 80

Moving on to step 2:
86 divided by 80 is 1 with a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 80 away from 86, we end up with 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 80

On to step 3:
The number 80 fits into 65 0 times, leaving a remainder of 65.
Use 0 as the next digit of our solution. 
Result so far: 10.0
The remainder is 65 after subtracting 0 from 65.
Include the next digit (9) from the dividend after 65, then repeat: 659 / 80

Moving on to step 4:
If we divide 659 by 80, we get 8 and a remainder of 19.
Use 8 as the next digit of our solution. 
Result so far: 108.0
Deduct 640 from 659 and we're left with 19.
Bring next digit (1) of the dividend behind the 19 and repeat the process: 191 / 80

Let's proceed to step 5:
If we divide 191 by 80, we get 2 and a remainder of 31.
The number 2 becomes the next digit in our result. 
Result so far: 1082.0
If we take 160 away from 191, we end up with 31.
Append the next digit (2) from the dividend to 31 and continue with: 312 / 80

Let's proceed to step 6:
80 can be fit into 312 3 times, resulting in a remainder of 72.
Put 3 as the next digit of the answer. 
Result so far: 10823.0
Deduct 240 from 312 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 7:
When dividing 720 by 80, we get 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 10823.9
The remainder is 0 after subtracting 720 from 720.
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 8:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 10823.9
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.

Moving on to step 9:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10823.9
Subtract 0 from 0 to 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.

After the division, we end up with 10823.9 and a remainder of 0.0.