We look at the division of 12131252 by 12 
Our goal is to divide 12131252 by 12.

On to step 1:
12 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 12

On to step 2:
If we divide 12 by 12, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 12 from 12, we get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 12

Advancing to step 3:
1 divided by 12 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 12

Advancing to step 4:
If we divide 13 by 12, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Subtracting 12 from 13 leaves us with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 12

On to step 5:
If we divide 11 by 12, we get 0 and a remainder of 11.
The number 0 becomes the next digit in our result. 
Result so far: 1010.0
If we take 0 away from 11, we end up with 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 12

Going ahead to step 6:
112 divided by 12 is 9 with a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 10109.0
Deduct 108 from 112 and we're left with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 12

Step 7:
If we divide 45 by 12, we get 3 and a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 101093.0
Deduct 36 from 45 and we're left with 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 12

On to step 8:
If we divide 92 by 12, we get 7 and a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 1010937.0
The remainder is 8 after subtracting 84 from 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
12 goes into 80 6 times with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 1010937.6
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
80 divided by 12 is 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 1010937.66
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 1010937.66 with a remaining 0.008.