CodeAcademy - Review of Functions in JS Sec 2/3, Ex 1/4

gistfile1.js

/*
1. A Function with 2 Parameters
Functions can have zero, one or more parameters. You can 
think of these as input that the function receives, and 
then uses to do something.

The code example shows a trivial function multiply function 
that takes two numbers as arguments and returns their product.

Do you remember how volume is defined? Complete the definition 
of the volume function.
*/

var multiply = function (x, y) {
   return x * y;
};

multiply(2, 5);

var volume = function (l, w, h) {
  return l * w * h;
};

volume(2, 3, 4);