We divide 12013909 by 115
We want to figure out the number of times 12013909 can be divided by 115.

Going ahead to step 1:
The number 115 fits into 1 0 times, leaving 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.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 115

On to step 2:
115 can be fit into 12 0 times, resulting in a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 115

Advancing to step 3:
When dividing 120 by 115, we get 1 with a remainder of 5.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 115 from 120 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 115

Advancing to step 4:
The number 115 fits into 51 0 times, leaving a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 51, we get 51.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 115

Advancing to step 5:
513 divided by 115 is 4 with a remainder of 53.
Write down 4 as next digit of the result. 
Result so far: 104.0
The remainder is 53 after subtracting 460 from 513.
Append the next digit (9) from the dividend to 53 and continue with: 539 / 115

Let's proceed to step 6:
If we divide 539 by 115, we get 4 and a remainder of 79.
The number 4 becomes the next digit in our result. 
Result so far: 1044.0
The remainder is 79 after subtracting 460 from 539.
Bring next digit (0) of the dividend behind the 79 and repeat the process: 790 / 115

Moving on to step 7:
790 divided by 115 is 6 with a remainder of 100.
Put 6 as the next digit of the answer. 
Result so far: 10446.0
If we subtract 690 from 790, we get 100.
Bring next digit (9) of the dividend behind the 100 and repeat the process: 1009 / 115

On to step 8:
If we divide 1009 by 115, we get 8 and a remainder of 89.
Write down 8 as next digit of the result. 
Result so far: 104468.0
If we take 920 away from 1009, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 9:
890 divided by 115 is 7 with a remainder of 85.
Use 7 as the next digit of our solution. 
Result so far: 104468.7
Subtract 805 from 890 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Let's proceed to step 10:
The number 115 fits into 850 7 times, leaving a remainder of 45.
Record the quotient 7 as the next digit in the result. 
Result so far: 104468.77
Deduct 805 from 850 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final result is 104468.77 with a remainder of 0.045.