We look at the division of 336549 by 18 
We want to figure out the number of times 336549 can be divided by 18.

On to step 1:
18 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 18

On to step 2:
18 can be fit into 33 1 times, resulting in a remainder of 15.
The next digit of our result is 1. 
Result so far: 1.0
If we take 18 away from 33, we end up with 15.
Append the next digit (6) from the dividend to 15 and continue with: 156 / 18

Advancing to step 3:
If we divide 156 by 18, we get 8 and a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 18.0
If we subtract 144 from 156, we get 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 18

Advancing to step 4:
18 goes into 125 6 times with a remainder of 17.
The next digit of our result is 6. 
Result so far: 186.0
The remainder is 17 after subtracting 108 from 125.
Include the next digit (4) from the dividend after 17, then repeat: 174 / 18

Advancing to step 5:
174 divided by 18 is 9 with a remainder of 12.
Record the quotient 9 as the next digit in the result. 
Result so far: 1869.0
Subtract 162 from 174 to get 12.
Bring next digit (9) of the dividend behind the 12 and repeat the process: 129 / 18

Step 6:
When dividing 129 by 18, we get 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 18697.0
Subtracting 126 from 129 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
18 can be fit into 30 1 times, resulting in a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 18697.1
Deduct 18 from 30 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.

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: 18697.16
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.

Step 9:
18 goes into 120 6 times with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 18697.166
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 18697.166 with a remaining 0.0012.