12508918 ÷ 12 
We're looking to find how many times 12 goes into 12508918.

Step 1:
When dividing 1 by 12, we get 0 with a remainder of 1.
The next digit of our result is 0. 
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 / 12

On to step 2:
12 goes into 12 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 12 away from 12, we end up with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 12

On to step 3:
12 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 12

Going ahead to step 4:
12 can be fit into 50 4 times, resulting in a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
Deduct 48 from 50 and we're left with 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 12

Let's proceed to step 5:
The number 12 fits into 28 2 times, leaving a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 1042.0
If we subtract 24 from 28, we get 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 12

Let's proceed to step 6:
When dividing 49 by 12, we get 4 with a remainder of 1.
The next digit of our result is 4. 
Result so far: 10424.0
Deduct 48 from 49 and we're left with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 12

Going ahead to step 7:
The number 12 fits into 11 0 times, leaving a remainder of 11.
Write down 0 as next digit of the result. 
Result so far: 104240.0
If we take 0 away from 11, we end up with 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 12

Moving on to step 8:
118 divided by 12 is 9 with a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 1042409.0
Subtracting 108 from 118 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
12 goes into 100 8 times with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 1042409.8
The remainder is 4 after subtracting 96 from 100.
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:
If we divide 40 by 12, we get 3 and a remainder of 4.
The next digit of our result is 3. 
Result so far: 1042409.83
Deduct 36 from 40 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 11:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 1042409.833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The quotient of the division is 1042409.833, and the remainder is 0.0004.