We look at the division of 420376 by 18 
Let's see how many times 18 fits into 420376.

Moving on to step 1:
18 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 18

On to step 2:
The number 18 fits into 42 2 times, leaving a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 36 from 42, we get 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 18

Step 3:
When dividing 60 by 18, we get 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 23.0
Deduct 54 from 60 and we're left with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 18

Moving on to step 4:
If we divide 63 by 18, we get 3 and a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 233.0
Deduct 54 from 63 and we're left with 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 18

On to step 5:
18 goes into 97 5 times with a remainder of 7.
The number 5 becomes the next digit in our result. 
Result so far: 2335.0
Deduct 90 from 97 and we're left with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 18

Advancing to step 6:
When dividing 76 by 18, we get 4 with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 23354.0
If we subtract 72 from 76, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
When dividing 40 by 18, we get 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 23354.2
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.

Going ahead to step 8:
40 divided by 18 is 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 23354.22
Subtracting 36 from 40 leaves us 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.

The final outcome is 23354.22, with a leftover of 0.004.