We're dividing 863581 by 80 
We're looking to find how many times 80 goes into 863581.

Going ahead to step 1:
When dividing 8 by 80, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
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:
86 divided by 80 is 1 with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 80 from 86 and we're left with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 80

Going ahead to step 3:
If we divide 63 by 80, we get 0 and a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 63 after subtracting 0 from 63.
Append the next digit (5) from the dividend to 63 and continue with: 635 / 80

Advancing to step 4:
The number 80 fits into 635 7 times, leaving a remainder of 75.
Write down 7 as next digit of the result. 
Result so far: 107.0
The remainder is 75 after subtracting 560 from 635.
Take the next digit (8) from the dividend and append it to 75, then repeat: 758 / 80

Going ahead to step 5:
758 divided by 80 is 9 with a remainder of 38.
Write down 9 as next digit of the result. 
Result so far: 1079.0
If we subtract 720 from 758, we get 38.
Fetch the next digit (1) from the dividend, attach it to 38 and continue: 381 / 80

On to step 6:
If we divide 381 by 80, we get 4 and a remainder of 61.
The number 4 becomes the next digit in our result. 
Result so far: 10794.0
The remainder is 61 after subtracting 320 from 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 7:
The number 80 fits into 610 7 times, leaving a remainder of 50.
Write down 7 as next digit of the result. 
Result so far: 10794.7
If we take 560 away from 610, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
500 divided by 80 is 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 10794.76
Subtract 480 from 500 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.

On to step 9:
When dividing 200 by 80, we get 2 with a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 10794.762
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:
When dividing 400 by 80, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 10794.7625
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.

Advancing to step 11:
80 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 10794.7625
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.

Step 12:
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: 10794.7625
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.

The final outcome is 10794.7625, with a leftover of 0.0.