We're dividing 13122951 by 666 
We want to figure out the number of times 13122951 can be divided by 666.

Step 1:
When dividing 1 by 666, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 666

Moving on to step 2:
When dividing 13 by 666, we get 0 with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Grab the next digit (1) from the dividend, add it to 13, then carry on: 131 / 666

Step 3:
666 goes into 131 0 times with a remainder of 131.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 131 and we're left with 131.
Append the next digit (2) from the dividend to 131 and continue with: 1312 / 666

Let's proceed to step 4:
When dividing 1312 by 666, we get 1 with a remainder of 646.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 666 from 1312 leaves us with 646.
Fetch the next digit (2) from the dividend, attach it to 646 and continue: 6462 / 666

Let's proceed to step 5:
When dividing 6462 by 666, we get 9 with a remainder of 468.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
If we subtract 5994 from 6462, we get 468.
Take the next digit (9) from the dividend and append it to 468, then repeat: 4689 / 666

Step 6:
666 can be fit into 4689 7 times, resulting in a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 197.0
Deduct 4662 from 4689 and we're left with 27.
Grab the next digit (5) from the dividend, add it to 27, then carry on: 275 / 666

On to step 7:
The number 666 fits into 275 0 times, leaving a remainder of 275.
The next digit of our result is 0. 
Result so far: 1970.0
Subtract 0 from 275 to get 275.
Include the next digit (1) from the dividend after 275, then repeat: 2751 / 666

Moving on to step 8:
666 goes into 2751 4 times with a remainder of 87.
Record the quotient 4 as the next digit in the result. 
Result so far: 19704.0
Deduct 2664 from 2751 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 9:
666 goes into 870 1 times with a remainder of 204.
The number 1 becomes the next digit in our result. 
Result so far: 19704.1
Subtracting 666 from 870 leaves us with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Advancing to step 10:
The number 666 fits into 2040 3 times, leaving a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 19704.13
If we subtract 1998 from 2040, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 11:
666 goes into 420 0 times with a remainder of 420.
The next digit of our result is 0. 
Result so far: 19704.13
The remainder is 420 after subtracting 0 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Let's proceed to step 12:
If we divide 4200 by 666, we get 6 and a remainder of 204.
Use 6 as the next digit of our solution. 
Result so far: 19704.1306
Deduct 3996 from 4200 and we're left with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

On to step 13:
The number 666 fits into 2040 3 times, leaving a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 19704.13063
If we subtract 1998 from 2040, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 14:
666 goes into 420 0 times with a remainder of 420.
Record the quotient 0 as the next digit in the result. 
Result so far: 19704.13063
If we take 0 away from 420, we end up with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Let's proceed to step 15:
666 can be fit into 4200 6 times, resulting in a remainder of 204.
Use 6 as the next digit of our solution. 
Result so far: 19704.1306306
Subtract 3996 from 4200 to get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

On to step 16:
The number 666 fits into 2040 3 times, leaving a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 19704.13063063
The remainder is 42 after subtracting 1998 from 2040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

The final result is 19704.13063063 with a remainder of 4.2e-08.