We're dividing 815529 by 66 
We want to figure out the number of times 815529 can be divided by 66.

Advancing to step 1:
The number 66 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 66

Going ahead to step 2:
If we divide 81 by 66, we get 1 and a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 66 from 81 to get 15.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 66

Advancing to step 3:
The number 66 fits into 155 2 times, leaving a remainder of 23.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
The remainder is 23 after subtracting 132 from 155.
Bring next digit (5) of the dividend behind the 23 and repeat the process: 235 / 66

Moving on to step 4:
66 goes into 235 3 times with a remainder of 37.
The next digit of our result is 3. 
Result so far: 123.0
Subtract 198 from 235 to get 37.
Include the next digit (2) from the dividend after 37, then repeat: 372 / 66

Moving on to step 5:
If we divide 372 by 66, we get 5 and a remainder of 42.
Record the quotient 5 as the next digit in the result. 
Result so far: 1235.0
Subtracting 330 from 372 leaves us with 42.
Append the next digit (9) from the dividend to 42 and continue with: 429 / 66

On to step 6:
66 can be fit into 429 6 times, resulting in a remainder of 33.
Write down 6 as next digit of the result. 
Result so far: 12356.0
The remainder is 33 after subtracting 396 from 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 7:
66 can be fit into 330 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 12356.5
If we subtract 330 from 330, 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.

Moving on to step 8:
66 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 12356.5
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.

Let's proceed to step 9:
66 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12356.5
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.

Our division results in 12356.5 with a remaining 0.0.