12731345 ÷ 666 
We want to figure out the number of times 12731345 can be divided by 666.

Let's proceed to step 1:
666 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 666

Advancing to step 2:
666 can be fit into 12 0 times, resulting in a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Include the next digit (7) from the dividend after 12, then repeat: 127 / 666

Let's proceed to step 3:
666 goes into 127 0 times with a remainder of 127.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 127, we get 127.
Append the next digit (3) from the dividend to 127 and continue with: 1273 / 666

Advancing to step 4:
If we divide 1273 by 666, we get 1 and a remainder of 607.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 666 from 1273 to get 607.
Bring next digit (1) of the dividend behind the 607 and repeat the process: 6071 / 666

Advancing to step 5:
666 can be fit into 6071 9 times, resulting in a remainder of 77.
The next digit of our result is 9. 
Result so far: 19.0
The remainder is 77 after subtracting 5994 from 6071.
Take the next digit (3) from the dividend and append it to 77, then repeat: 773 / 666

Let's proceed to step 6:
666 can be fit into 773 1 times, resulting in a remainder of 107.
The next digit of our result is 1. 
Result so far: 191.0
If we subtract 666 from 773, we get 107.
Bring next digit (4) of the dividend behind the 107 and repeat the process: 1074 / 666

On to step 7:
1074 divided by 666 is 1 with a remainder of 408.
The number 1 becomes the next digit in our result. 
Result so far: 1911.0
If we subtract 666 from 1074, we get 408.
Append the next digit (5) from the dividend to 408 and continue with: 4085 / 666

Let's proceed to step 8:
4085 divided by 666 is 6 with a remainder of 89.
Record the quotient 6 as the next digit in the result. 
Result so far: 19116.0
Deduct 3996 from 4085 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 9:
When dividing 890 by 666, we get 1 with a remainder of 224.
Write down 1 as next digit of the result. 
Result so far: 19116.1
If we subtract 666 from 890, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Let's proceed to step 10:
666 goes into 2240 3 times with a remainder of 242.
The number 3 becomes the next digit in our result. 
Result so far: 19116.13
If we subtract 1998 from 2240, we get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

On to step 11:
The number 666 fits into 2420 3 times, leaving a remainder of 422.
The number 3 becomes the next digit in our result. 
Result so far: 19116.133
Subtracting 1998 from 2420 leaves us with 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

The final result is 19116.133 with a remainder of 0.0422.