408648 ÷ 18 
We want to figure out the number of times 408648 can be divided by 18.

Going ahead to step 1:
When dividing 4 by 18, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 18

Let's proceed to step 2:
If we divide 40 by 18, we get 2 and a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 36 from 40 and we're left with 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 18

Let's proceed to step 3:
48 divided by 18 is 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 22.0
Subtracting 36 from 48 leaves us with 12.
Grab the next digit (6) from the dividend, add it to 12, then carry on: 126 / 18

Step 4:
126 divided by 18 is 7 with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 227.0
The remainder is 0 after subtracting 126 from 126.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 18

Going ahead to step 5:
4 divided by 18 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 2270.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 18

Going ahead to step 6:
The number 18 fits into 48 2 times, leaving a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 22702.0
If we take 36 away from 48, 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.

Going ahead to step 7:
120 divided by 18 is 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 22702.6
Subtract 108 from 120 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
120 divided by 18 is 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 22702.66
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.

The final result is 22702.66 with a remainder of 0.012.