Let's divide 12379740 by 12
We're looking to find how many times 12 goes into 12379740.

Step 1:
12 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 12

Moving on to step 2:
When dividing 12 by 12, we get 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 12 from 12, we get 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 12

On to step 3:
If we divide 3 by 12, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 3 to get 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 12

Going ahead to step 4:
The number 12 fits into 37 3 times, leaving a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 103.0
Deduct 36 from 37 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 12

Let's proceed to step 5:
If we divide 19 by 12, we get 1 and a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 1031.0
If we subtract 12 from 19, we get 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 12

Let's proceed to step 6:
12 can be fit into 77 6 times, resulting in a remainder of 5.
The next digit of our result is 6. 
Result so far: 10316.0
Subtracting 72 from 77 leaves us with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 12

Moving on to step 7:
54 divided by 12 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 103164.0
Subtract 48 from 54 to get 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 12

Step 8:
12 can be fit into 60 5 times, resulting in a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 1031645.0
Subtract 60 from 60 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.

Step 9:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1031645.0
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.

Moving on to step 10:
When dividing 0 by 12, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1031645.0
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.

After the division, we end up with 1031645.0 and a remainder of 0.0.