Let’s say I wanted to say “This is what I need” in French. In this case, I know to use the “ce dont” construction, and I’d say “C’est ce dont j’ai besoin ”.
However, I’ve never learned how to deal with a situation where a verb takes an “à”, such as “penser à”. Like if I wanted to say “this is what I’m thinking about”, google translate is telling me it’s “c’est ce à quoi je pense”, but I don't know if that’s right or not.