We look at the division of 405686 by 18 
We want to divide 405686 by 18.

Step 1:
If we divide 4 by 18, we get 0 and 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.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 18

Moving on to step 2:
If we divide 40 by 18, we get 2 and a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 36 from 40 leaves us with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 18

Let's proceed to step 3:
18 can be fit into 45 2 times, resulting in a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we subtract 36 from 45, we get 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 18

Advancing to step 4:
96 divided by 18 is 5 with a remainder of 6.
Write down 5 as next digit of the result. 
Result so far: 225.0
Subtract 90 from 96 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 18

Step 5:
68 divided by 18 is 3 with a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 2253.0
Deduct 54 from 68 and we're left with 14.
Include the next digit (6) from the dividend after 14, then repeat: 146 / 18

Let's proceed to step 6:
The number 18 fits into 146 8 times, leaving a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 22538.0
The remainder is 2 after subtracting 144 from 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
The number 18 fits into 20 1 times, leaving a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 22538.1
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
If we divide 20 by 18, we get 1 and a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 22538.11
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 22538.11, and the remainder is 0.002.