865521 divided by 80 
We're looking to find how many times 80 goes into 865521.

Moving on 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
The remainder is 8 after subtracting 0 from 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 80

Let's proceed to step 2:
If we divide 86 by 80, we get 1 and a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 6 after subtracting 80 from 86.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 80

Let's proceed to step 3:
80 can be fit into 65 0 times, resulting in a remainder of 65.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we subtract 0 from 65, we get 65.
Append the next digit (5) from the dividend to 65 and continue with: 655 / 80

Advancing to step 4:
If we divide 655 by 80, we get 8 and a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 108.0
The remainder is 15 after subtracting 640 from 655.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 80

Advancing to step 5:
The number 80 fits into 152 1 times, leaving a remainder of 72.
The number 1 becomes the next digit in our result. 
Result so far: 1081.0
The remainder is 72 after subtracting 80 from 152.
Include the next digit (1) from the dividend after 72, then repeat: 721 / 80

Step 6:
When dividing 721 by 80, we get 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 10819.0
Deduct 720 from 721 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
When dividing 10 by 80, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 10819.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
The number 80 fits into 100 1 times, leaving a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 10819.01
Subtract 80 from 100 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
80 goes into 200 2 times with a remainder of 40.
The next digit of our result is 2. 
Result so far: 10819.012
Subtracting 160 from 200 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
400 divided by 80 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 10819.0125
The remainder is 0 after subtracting 400 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10819.0125
Subtracting 0 from 0 leaves us 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.

On to step 12:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10819.0125
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.

The final outcome is 10819.0125, with a leftover of 0.0.