None.
The size of a container is normally defined in terms of three measures: length, width and height. There are only two measures given.
36x36=1296
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.
A 72x72x24 foot container holds 930,696.3 gallons.
The capacity of the container is 56.727 gallons (rounded)
36x36=1296
128
24,685.7 gallons.
19.64 US gallons.
10.38961 gallons (rounded)
4.65 gallons
A 35,200 cubic foot container can hold up to 263,314.29 gallons.
It could be 497 gallons, depending on the size of the container.
52.l
83.12 gallons