How did you decide whether to group this as a function, or not a function?
plz plz help

Pls , the question is in the picture!

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl