I want to code in Scheme

But I don't really know how to write idiomatic code. Is anyone here willing to rewrite some of my python code, so I can see how it's done?

Also, what is the code-tag on this board?

prod=foldr(\x->((:)<$>x<*>))[[]]

*Main> prod [[1,2,3],[4,5],[6,7,8]]
[[1,4,6],[1,4,7],[1,4,8],[1,5,6],[1,5,7],[1,5,8],[2,4,6],[2,4,7],[2,4,8],[2,5,6],[2,5,7],[2,5,8],[3,4,6],[3,4,7],[3,4,8],[3,5,6],[3,5,7],[3,5,8]]