None.
The size of a container is normally defined in terms of three measures: length, width and height. There are only two measures given.
Approx 2.1 Imperial gallons = 2.5 US gallons.
24" x 24" x 36" = 89.8 US gallons.
The volume of a container requires three measures: 18 x 30 is not enough.
There are about 7.48 US gallons in a 12 x 12 x 12 (or 1728) cubic inch container. (That's a cubic foot, but you probably knew that.) There are about 12,926.3 US gallons in a 12 x 12 x 12 cubic foot container. Other units of measure of your 12 x 12 x 12 container will yield different results.
36 36X36=1296
The capacity of the container is 56.727 gallons (rounded)
A 72x72x24 foot container holds 930,696.3 gallons.
24,685.7 gallons.
128
4.65 gallons
10.38961 gallons (rounded)
19.64 US gallons.
A 35,200 cubic foot container can hold up to 263,314.29 gallons.
That would depend on the size of the container.
It could be 497 gallons, depending on the size of the container.
52.l
83.12 gallons