Hi,(Hi)

How do I represent {5,7,3} x [1,2] geometrically?

I know to represent the cross product of 2 vectors. But , here, I am not sure , since the brackets used for both are different . Does it mean that {5,7,3} is a set/vector and [1,2] is a matrix?(Thinking)

Also, does the 'x' mean multiplication or cross product?(Worried)