Let's divide 420204 by 18
Our goal is to divide 420204 by 18.

Let's proceed to step 1:
If we divide 4 by 18, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 18

On to step 2:
When dividing 42 by 18, we get 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 36 from 42 and we're left with 6.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 18

Step 3:
The number 18 fits into 60 3 times, leaving a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 23.0
The remainder is 6 after subtracting 54 from 60.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 18

Let's proceed to step 4:
18 goes into 62 3 times with a remainder of 8.
The next digit of our result is 3. 
Result so far: 233.0
Subtracting 54 from 62 leaves us with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 18

Let's proceed to step 5:
80 divided by 18 is 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 2334.0
Subtracting 72 from 80 leaves us with 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 18

Let's proceed to step 6:
18 can be fit into 84 4 times, resulting in a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 23344.0
Subtract 72 from 84 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
When dividing 120 by 18, we get 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 23344.6
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
The number 18 fits into 120 6 times, leaving a remainder of 12.
The next digit of our result is 6. 
Result so far: 23344.66
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 23344.66, with a leftover of 0.012.