Your question follows the pattern "Do you know X?", with the "X" being the object of the verb "know". Because it's an object, it must have the subject before the verb (...we are...). When you say "Are we" then you are doing what is called inversion (to invert = to reverse/flip). Inversion is done when asking a question, such as "Are we going?", but not when you put it into a sentence as an object. I hope that's clear. It also applies to statements such as "I know where we are going." and "I know (that) he likes her.", for example. Please feel free to ask me anything on my page. :)
When does andiamo mean "we are slow"? This is the first suggestion duolingo offers and I've never heard of this translation.