863555 divided by 80 
We want to divide 863555 by 80.

Advancing to step 1:
If we divide 8 by 80, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 80

On to step 2:
80 can be fit into 86 1 times, resulting in a remainder of 6.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 80 away from 86, we end up with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 80

Moving on to step 3:
80 can be fit into 63 0 times, resulting in a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 63, we get 63.
Take the next digit (5) from the dividend and append it to 63, then repeat: 635 / 80

Advancing to step 4:
When dividing 635 by 80, we get 7 with a remainder of 75.
The next digit of our result is 7. 
Result so far: 107.0
Subtract 560 from 635 to get 75.
Fetch the next digit (5) from the dividend, attach it to 75 and continue: 755 / 80

Going ahead to step 5:
When dividing 755 by 80, we get 9 with a remainder of 35.
Use 9 as the next digit of our solution. 
Result so far: 1079.0
Subtract 720 from 755 to get 35.
Include the next digit (5) from the dividend after 35, then repeat: 355 / 80

On to step 6:
355 divided by 80 is 4 with a remainder of 35.
Write down 4 as next digit of the result. 
Result so far: 10794.0
The remainder is 35 after subtracting 320 from 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 7:
The number 80 fits into 350 4 times, leaving a remainder of 30.
Use 4 as the next digit of our solution. 
Result so far: 10794.4
Subtract 320 from 350 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
The number 80 fits into 300 3 times, leaving a remainder of 60.
Record the quotient 3 as the next digit in the result. 
Result so far: 10794.43
Deduct 240 from 300 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
80 goes into 600 7 times with a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 10794.437
If we subtract 560 from 600, 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 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 10794.4375
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:
80 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: 10794.4375
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:
0 divided by 80 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10794.4375
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 result is 10794.4375 with a remainder of 0.0.