We're dividing 142513 by 12 
We're looking to find how many times 12 goes into 142513.

Moving on to step 1:
If we divide 1 by 12, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 12

Going ahead to step 2:
14 divided by 12 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 12 away from 14, we end up with 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 12

Step 3:
22 divided by 12 is 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 12 away from 22, we end up with 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 12

Moving on to step 4:
12 goes into 105 8 times with a remainder of 9.
The next digit of our result is 8. 
Result so far: 118.0
Deduct 96 from 105 and we're left with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 12

Going ahead to step 5:
12 can be fit into 91 7 times, resulting in a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 1187.0
The remainder is 7 after subtracting 84 from 91.
Take the next digit (3) from the dividend and append it to 7, then repeat: 73 / 12

On to step 6:
73 divided by 12 is 6 with a remainder of 1.
The next digit of our result is 6. 
Result so far: 11876.0
Subtracting 72 from 73 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
12 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 11876.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 11876.08
Deduct 96 from 100 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 11876.083
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 10:
The number 12 fits into 40 3 times, leaving a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 11876.0833
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 11876.0833, with a leftover of 4e-05.