Gary will be three times as old as Harry $$4$$ years from now. If Harry is $$5$$ years old now, how old will Gary be in $$4$$ years? 
Overseas Competition->Knowledge Point->Word Problem Modules->Age Problems->Basic Relationships in Age Problems
Harry is $$5$$ years old now; he\textquotesingle ll be $$9$$ in $$4$$ years.  Gary is thus $$3\times9=27$$ years old 