Learning to use the calculator on the cell phone

While shopping, I wanted to have an idea of the cost of a box (instead of just buying it by the piece) of Easter candy. Surely, the cell phone in my pocket had a calculator feature, but how to use it? A nice young lady clerk was standing close, so I just asked her: "How do I multiply on this thing?" She showed me how to do the calculations!

For those of you that know me, it didn't matter how much the box was going to cost, I was going to purchase it anyway.