A boy has nine trousers and 12 shirts

A boy has nine trousers and 12 shirts. In how many different ways can he select a trouser and a shirt?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #3136