We're dividing 811511 by 80 
We want to figure out the number of times 811511 can be divided by 80.

Step 1:
80 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 80

Advancing to step 2:
80 goes into 81 1 times with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 1 after subtracting 80 from 81.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 80

Step 3:
If we divide 11 by 80, we get 0 and a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we take 0 away from 11, we end up with 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 80

Step 4:
80 goes into 115 1 times with a remainder of 35.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Subtracting 80 from 115 leaves us with 35.
Include the next digit (1) from the dividend after 35, then repeat: 351 / 80

Advancing to step 5:
351 divided by 80 is 4 with a remainder of 31.
Record the quotient 4 as the next digit in the result. 
Result so far: 1014.0
If we subtract 320 from 351, we get 31.
Take the next digit (1) from the dividend and append it to 31, then repeat: 311 / 80

Moving on to step 6:
If we divide 311 by 80, we get 3 and a remainder of 71.
Record the quotient 3 as the next digit in the result. 
Result so far: 10143.0
Subtracting 240 from 311 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 7:
710 divided by 80 is 8 with a remainder of 70.
Record the quotient 8 as the next digit in the result. 
Result so far: 10143.8
The remainder is 70 after subtracting 640 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
80 can be fit into 700 8 times, resulting in a remainder of 60.
The next digit of our result is 8. 
Result so far: 10143.88
Subtracting 640 from 700 leaves us 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.

After the division, we end up with 10143.88 and a remainder of 0.06.