12145313 ÷ 109 
We want to figure out the number of times 12145313 can be divided by 109.

Going ahead to step 1:
The number 109 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 109

Let's proceed to step 2:
If we divide 12 by 109, we get 0 and a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 109

On to step 3:
If we divide 121 by 109, we get 1 and a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 109 from 121, we get 12.
Grab the next digit (4) from the dividend, add it to 12, then carry on: 124 / 109

On to step 4:
If we divide 124 by 109, we get 1 and a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 11.0
If we take 109 away from 124, we end up with 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 109

Going ahead to step 5:
155 divided by 109 is 1 with a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 111.0
Subtract 109 from 155 to get 46.
Grab the next digit (3) from the dividend, add it to 46, then carry on: 463 / 109

On to step 6:
463 divided by 109 is 4 with a remainder of 27.
Record the quotient 4 as the next digit in the result. 
Result so far: 1114.0
Subtracting 436 from 463 leaves us with 27.
Take the next digit (1) from the dividend and append it to 27, then repeat: 271 / 109

Let's proceed to step 7:
109 goes into 271 2 times with a remainder of 53.
Write down 2 as next digit of the result. 
Result so far: 11142.0
If we subtract 218 from 271, we get 53.
Include the next digit (3) from the dividend after 53, then repeat: 533 / 109

On to step 8:
109 can be fit into 533 4 times, resulting in a remainder of 97.
Use 4 as the next digit of our solution. 
Result so far: 111424.0
The remainder is 97 after subtracting 436 from 533.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Going ahead to step 9:
109 can be fit into 970 8 times, resulting in a remainder of 98.
Put 8 as the next digit of the answer. 
Result so far: 111424.8
Deduct 872 from 970 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 10:
109 can be fit into 980 8 times, resulting in a remainder of 108.
Record the quotient 8 as the next digit in the result. 
Result so far: 111424.88
If we take 872 away from 980, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

The quotient of the division is 111424.88, and the remainder is 0.108.