We divide 12345960 by 660
Our goal is to divide 12345960 by 660.

Advancing to step 1:
If we divide 1 by 660, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 660

Going ahead to step 2:
660 can be fit into 12 0 times, resulting in a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 660

Advancing to step 3:
When dividing 123 by 660, we get 0 with a remainder of 123.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 123 leaves us with 123.
Take the next digit (4) from the dividend and append it to 123, then repeat: 1234 / 660

Advancing to step 4:
660 can be fit into 1234 1 times, resulting in a remainder of 574.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 660 from 1234 to get 574.
Fetch the next digit (5) from the dividend, attach it to 574 and continue: 5745 / 660

Step 5:
660 can be fit into 5745 8 times, resulting in a remainder of 465.
The next digit of our result is 8. 
Result so far: 18.0
Deduct 5280 from 5745 and we're left with 465.
Include the next digit (9) from the dividend after 465, then repeat: 4659 / 660

Step 6:
The number 660 fits into 4659 7 times, leaving a remainder of 39.
The number 7 becomes the next digit in our result. 
Result so far: 187.0
If we take 4620 away from 4659, we end up with 39.
Bring next digit (6) of the dividend behind the 39 and repeat the process: 396 / 660

Let's proceed to step 7:
660 goes into 396 0 times with a remainder of 396.
Use 0 as the next digit of our solution. 
Result so far: 1870.0
If we take 0 away from 396, we end up with 396.
Append the next digit (0) from the dividend to 396 and continue with: 3960 / 660

Going ahead to step 8:
The number 660 fits into 3960 6 times, leaving a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 18706.0
Deduct 3960 from 3960 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.

On to step 9:
If we divide 0 by 660, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 18706.0
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.

Moving on to step 10:
If we divide 0 by 660, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 18706.0
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 18706.0 and a remainder of 0.0.