I have no idea what to do with my life or what career I want. Where do I start?

I have really no idea what I want to do. I just know that I really want a job that earns a lot of money (so not like a teacher or anything like that). The only thing I really know I'm super good at, and everyone is impressed by especially since I'm a girl, is Math. I have a special knack for it. Anyway, I really have to choose a particular path towards a career soon. What should I do?