We look at the division of 815149 by 80 
We want to figure out the number of times 815149 can be divided by 80.

On to step 1:
8 divided by 80 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 80

Step 2:
The number 80 fits into 81 1 times, leaving a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 80 away from 81, we end up with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 80

Moving on to step 3:
When dividing 15 by 80, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtracting 0 from 15 leaves us with 15.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 80

Let's proceed to step 4:
80 can be fit into 151 1 times, resulting in a remainder of 71.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Subtracting 80 from 151 leaves us with 71.
Grab the next digit (4) from the dividend, add it to 71, then carry on: 714 / 80

Step 5:
If we divide 714 by 80, we get 8 and a remainder of 74.
The next digit of our result is 8. 
Result so far: 1018.0
The remainder is 74 after subtracting 640 from 714.
Fetch the next digit (9) from the dividend, attach it to 74 and continue: 749 / 80

Advancing to step 6:
749 divided by 80 is 9 with a remainder of 29.
The number 9 becomes the next digit in our result. 
Result so far: 10189.0
Subtracting 720 from 749 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 7:
290 divided by 80 is 3 with a remainder of 50.
The number 3 becomes the next digit in our result. 
Result so far: 10189.3
Subtracting 240 from 290 leaves us 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.

Moving on to step 8:
80 goes into 500 6 times with a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 10189.36
Deduct 480 from 500 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
If we divide 200 by 80, we get 2 and a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 10189.362
If we subtract 160 from 200, 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:
80 can be fit into 400 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10189.3625
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:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10189.3625
Deduct 0 from 0 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 12:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10189.3625
Deduct 0 from 0 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.

Our division results in 10189.3625 with a remaining 0.0.