Alright, lets get started.
The dimension of ice cream cake is :
lenght = 19 ft
width = 9 ft
height = 2 ft
The shape of cake is rectangular prism.
The volume of rectangular prism : w h l
Means volume of cake = 19 * 9 * 2
volume of cake = 342 cubic feet
We need to give our answer in nearest gallons.
1 gallon = 0.134 cubic feet or
0.134 cubic feet = 1 gallon
342 cubic feet = 342/0.134 = 2552.2388 gallons
To the nearest gallon = 2552 gallons
Hence the volume of cake = 2552 gallons : Answer
Hope it will help :)