871555 divided by 80 
We're looking to find how many times 80 goes into 871555.

Going ahead to step 1:
80 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 80

On to step 2:
The number 80 fits into 87 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 80 from 87 and we're left with 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 80

Step 3:
71 divided by 80 is 0 with a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 71 after subtracting 0 from 71.
Fetch the next digit (5) from the dividend, attach it to 71 and continue: 715 / 80

Advancing to step 4:
80 goes into 715 8 times with a remainder of 75.
Use 8 as the next digit of our solution. 
Result so far: 108.0
The remainder is 75 after subtracting 640 from 715.
Bring next digit (5) of the dividend behind the 75 and repeat the process: 755 / 80

Moving on to step 5:
The number 80 fits into 755 9 times, leaving a remainder of 35.
Record the quotient 9 as the next digit in the result. 
Result so far: 1089.0
If we take 720 away from 755, we end up with 35.
Grab the next digit (5) from the dividend, add it to 35, then carry on: 355 / 80

Step 6:
If we divide 355 by 80, we get 4 and a remainder of 35.
The number 4 becomes the next digit in our result. 
Result so far: 10894.0
If we take 320 away from 355, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 7:
80 goes into 350 4 times with a remainder of 30.
Write down 4 as next digit of the result. 
Result so far: 10894.4
The remainder is 30 after subtracting 320 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
80 goes into 300 3 times with a remainder of 60.
Write down 3 as next digit of the result. 
Result so far: 10894.43
The remainder is 60 after subtracting 240 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
80 can be fit into 600 7 times, resulting in a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 10894.437
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10894.4375
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 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 10894.4375
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.

Step 12:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10894.4375
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.

The final result is 10894.4375 with a remainder of 0.0.