542239 divided by 18 
We want to figure out the number of times 542239 can be divided by 18.

On to step 1:
5 divided by 18 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 18

Step 2:
18 goes into 54 3 times with a remainder of 0.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 54 from 54 to get 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 18

Going ahead to step 3:
18 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Subtract 0 from 2 to get 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 18

On to step 4:
If we divide 22 by 18, we get 1 and a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 301.0
If we take 18 away from 22, we end up with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 18

Step 5:
18 can be fit into 43 2 times, resulting in a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 3012.0
Subtract 36 from 43 to get 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 18

Let's proceed to step 6:
79 divided by 18 is 4 with a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 30124.0
Deduct 72 from 79 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 7:
70 divided by 18 is 3 with a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 30124.3
If we take 54 away from 70, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 8:
When dividing 160 by 18, we get 8 with a remainder of 16.
The next digit of our result is 8. 
Result so far: 30124.38
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
18 can be fit into 160 8 times, resulting in a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 30124.388
Subtracting 144 from 160 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 30124.388, with a leftover of 0.0016.