statistics how to set up this problem

Question

as a fundraiser, a class is selling sandwiches. A Sandwichcan be made with white bread or wheat bread. it can be filled with ham, turkey, or vegetables. It can have swiss, american, provolone or mozzarella. how many differnt kinds of sandwiches can the class sell

Answer 1

There are 2 types of bread, 3 types of filling, and 4 types of cheese.  If each sandwich has one type of bread, one type of filling, and one type of cheese, then the number of different sandwiches is 

 

(2)(3)(4) = 24