I want the maximum of column A when column B contains a certain word. I tried
=max(A:A*(B:B="word"))

but get 0. Thinking that the B reference was the problem, I tried

=max(B:B="word")

and get 0, although if I choose a cell that contains word,

=max(B5="word")

I get 1. So clearly I don't know how to do this reference. What's the
right way?

Thanks