An design manager has 10patterns of chairs & 7patterns of tables

An design manager has 10patterns of chairs & 7patterns of tables. In how many ways can he make a pair of table & chair?

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 #8626