What? A number next to parenthesis always means multiplication
No, it means distribution, a(b+c)=(ab+ac)
Are people really not taught this anymore?
They're taught distribution yes. It's only adults who've forgotten the rules of Maths who get these wrong

I'm in Australia, and I remember being taught it, and I teach it.
The rules are the same everywhere, only the notation varies (in Germany they use . for multiply and : for divide, and say "dot before slash", slash being - and +).