We're dividing 402426 by 18 
Let's see how many times 18 fits into 402426.

Advancing to step 1:
When dividing 4 by 18, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 18

Going ahead to step 2:
18 goes into 40 2 times with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 36 from 40 to get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 18

Going ahead to step 3:
When dividing 42 by 18, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 22.0
Subtracting 36 from 42 leaves us with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 18

Going ahead to step 4:
18 can be fit into 64 3 times, resulting in a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 223.0
The remainder is 10 after subtracting 54 from 64.
Include the next digit (2) from the dividend after 10, then repeat: 102 / 18

On to step 5:
18 goes into 102 5 times with a remainder of 12.
The next digit of our result is 5. 
Result so far: 2235.0
The remainder is 12 after subtracting 90 from 102.
Include the next digit (6) from the dividend after 12, then repeat: 126 / 18

Advancing to step 6:
126 divided by 18 is 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 22357.0
The remainder is 0 after subtracting 126 from 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 7:
0 divided by 18 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 22357.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
18 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 22357.0
Deduct 0 from 0 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.

The quotient of the division is 22357.0, and the remainder is 0.0.