Let's divide 815434 by 80
We're looking to find how many times 80 goes into 815434.

Moving on to step 1:
The number 80 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 80

Let's proceed to step 2:
The number 80 fits into 81 1 times, leaving a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 80 from 81, we get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 80

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
If we take 0 away from 15, we end up with 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 80

Advancing to step 4:
80 can be fit into 154 1 times, resulting in a remainder of 74.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
If we subtract 80 from 154, we get 74.
Append the next digit (3) from the dividend to 74 and continue with: 743 / 80

Step 5:
If we divide 743 by 80, we get 9 and a remainder of 23.
Record the quotient 9 as the next digit in the result. 
Result so far: 1019.0
Subtracting 720 from 743 leaves us with 23.
Grab the next digit (4) from the dividend, add it to 23, then carry on: 234 / 80

On to step 6:
The number 80 fits into 234 2 times, leaving a remainder of 74.
The next digit of our result is 2. 
Result so far: 10192.0
Subtract 160 from 234 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 7:
80 goes into 740 9 times with a remainder of 20.
Record the quotient 9 as the next digit in the result. 
Result so far: 10192.9
The remainder is 20 after subtracting 720 from 740.
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 8:
200 divided by 80 is 2 with a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 10192.92
Deduct 160 from 200 and we're left 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.

Moving on to step 9:
The number 80 fits into 400 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 10192.925
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 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10192.925
Subtract 0 from 0 to 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.

Let's proceed to step 11:
0 divided by 80 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10192.925
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.

After the division, we end up with 10192.925 and a remainder of 0.0.