We look at the division of 129924 by 18 
Let's see how many times 18 fits into 129924.

Let's proceed to step 1:
The number 18 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 18

Moving on to step 2:
18 can be fit into 12 0 times, resulting in a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 18

Step 3:
18 goes into 129 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 126 from 129 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 18

Step 4:
39 divided by 18 is 2 with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 72.0
Subtracting 36 from 39 leaves us with 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 18

Step 5:
When dividing 32 by 18, we get 1 with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 721.0
If we take 18 away from 32, we end up with 14.
Bring next digit (4) of the dividend behind the 14 and repeat the process: 144 / 18

Advancing to step 6:
18 can be fit into 144 8 times, resulting in a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 7218.0
Deduct 144 from 144 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
When dividing 0 by 18, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 7218.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
0 divided by 18 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7218.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 7218.0 with a remaining 0.0.