686433 ÷ 18 
We're looking to find how many times 18 goes into 686433.

Moving on to step 1:
When dividing 6 by 18, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 18

On to step 2:
68 divided by 18 is 3 with a remainder of 14.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 54 from 68, we get 14.
Take the next digit (6) from the dividend and append it to 14, then repeat: 146 / 18

Let's proceed to step 3:
146 divided by 18 is 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 38.0
Subtracting 144 from 146 leaves us with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 18

Advancing to step 4:
24 divided by 18 is 1 with a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 381.0
Subtracting 18 from 24 leaves us with 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 18

Step 5:
If we divide 63 by 18, we get 3 and a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 3813.0
Subtract 54 from 63 to get 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 18

Let's proceed to step 6:
The number 18 fits into 93 5 times, leaving a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 38135.0
If we subtract 90 from 93, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
30 divided by 18 is 1 with a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 38135.1
If we take 18 away from 30, 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.

On to step 8:
18 can be fit into 120 6 times, resulting in a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 38135.16
Subtracting 108 from 120 leaves us 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.

Going ahead to step 9:
18 can be fit into 120 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 38135.166
Deduct 108 from 120 and we're left 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.

After the division, we end up with 38135.166 and a remainder of 0.0012.