We're dividing 423441 by 18 
We want to figure out the number of times 423441 can be divided by 18.

Moving on to step 1:
18 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 18

Step 2:
42 divided by 18 is 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 36 from 42 leaves us with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 18

Going ahead to step 3:
If we divide 63 by 18, we get 3 and a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
Deduct 54 from 63 and we're left with 9.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 18

Advancing to step 4:
94 divided by 18 is 5 with a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 235.0
If we subtract 90 from 94, we get 4.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 18

Going ahead to step 5:
18 goes into 44 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 2352.0
Subtracting 36 from 44 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 18

Step 6:
The number 18 fits into 81 4 times, leaving a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 23524.0
If we take 72 away from 81, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
18 can be fit into 90 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 23524.5
Subtracting 90 from 90 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.

Going ahead to step 8:
18 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 23524.5
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 9:
When dividing 0 by 18, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 23524.5
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.

After the division, we end up with 23524.5 and a remainder of 0.0.