684405 divided by 18 
Our goal is to divide 684405 by 18.

On to step 1:
The number 18 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 18

Let's proceed to step 2:
When dividing 68 by 18, we get 3 with a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 54 from 68 to get 14.
Bring next digit (4) of the dividend behind the 14 and repeat the process: 144 / 18

Step 3:
If we divide 144 by 18, we get 8 and a remainder of 0.
The next digit of our result is 8. 
Result so far: 38.0
If we take 144 away from 144, we end up with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 18

Going ahead to step 4:
When dividing 4 by 18, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 380.0
If we subtract 0 from 4, we get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 18

Moving on to step 5:
18 goes into 40 2 times with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 3802.0
Deduct 36 from 40 and we're left with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 18

Step 6:
18 goes into 45 2 times with a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 38022.0
If we subtract 36 from 45, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
18 goes into 90 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 38022.5
Deduct 90 from 90 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.

On to step 8:
If we divide 0 by 18, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 38022.5
If we subtract 0 from 0, we 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.

Going ahead to step 9:
18 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 38022.5
If we take 0 away from 0, we end up 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 38022.5, and the remainder is 0.0.