Financial Calculations

No.13523413 ViewReplyOriginalReport
Why did Einstein supposedly say that compound interest was
>the most powerful force in the universe.
and
> wonder of the world. He who understands it, earns it; he who doesn’t, pays it.
?
Can someone explain compound and simple interest? The explanations online are kind of confusing since there are multiple equations and they almost contradict each other (some take into account when interest is applied and some don't). What are annuities? What are some other financial devices we should be aware of?