其它
Nick wants to bake a cake that consists of only $$1$$ flavour and $$1$$ topping. He gets to choose from $$3$$ different flavours and $$3$$ different toppings. How many different kinds of cake can he make? 
Overseas Competition->Knowledge Point->Counting Modules->Questions Involving Enumeration->Enumeration
$$3\times3=9$$ 