Let's divide 138015 by 12
We want to figure out the number of times 138015 can be divided by 12.

Step 1:
12 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 12

On to step 2:
13 divided by 12 is 1 with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 12 from 13, we get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 12

Moving on to step 3:
12 goes into 18 1 times with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 12 away from 18, we end up with 6.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 12

On to step 4:
12 goes into 60 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 115.0
The remainder is 0 after subtracting 60 from 60.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 12

Step 5:
1 divided by 12 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 1150.0
If we take 0 away from 1, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 12

Going ahead to step 6:
If we divide 15 by 12, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 11501.0
Subtract 12 from 15 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
12 goes into 30 2 times with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 11501.2
The remainder is 6 after subtracting 24 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
12 can be fit into 60 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 11501.25
Subtracting 60 from 60 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.

On to step 9:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 11501.25
The remainder is 0 after subtracting 0 from 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:
12 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 11501.25
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.

The quotient of the division is 11501.25, and the remainder is 0.0.