Hello,

(I know the tons in kg, I hope you were speaking of "short tons")

So

So I don't think your answer is right.

Hmmm if L stands for Litres, then it is not possible since L is for volumes, not areas !

1 foot=304.8 mm. (we know that 1 foot=30.48 cm and 1cm=10mm)

So 20ft x 30ft=(20*304.8)(30*304.8) mm˛=5.57*10^7

Okay.

I think you have a problem with the cm, mm, etc... meanings.

The standard unit is m (for meter)

Here is a table of correspondance :

remember that the same letters in front of m apply to litres and grams.

We know that 1 gallon = 3,78541178 litres

Now, remember that 1L=1 dm^3, that is to say

or

Try to do it

No, it is

dm^3

Edit : I must say I cheat a little since I'm in a country where we use these metric systems. On the contrary, it's a real difficulty if we travel to the USA