Yuki and Claire are looking for a place to eat dinner. They know there are four Chinese restaurants, three French restaurants, and two Peruvian restaurants nearby. There are~\uline{~~~~~~~~~~}~different choices in total for them to eat one meal in one place. 
Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations
They can only choose one place, so it can only be either Chinese, French, or Peruvian restaurants. Therefore, we can add each one up to get $$4+3+2 = 9$$.~ 