Yes, the question is on-topic.
If a question How is <coiso> understood in <country>?
is on-topic,
so must its counter-point How should I understand <coiso> in <country>?
be on-topic.
And this question can be distilled to How should I understand "salary of RS123$456R$ 2.000,00", in Brazil?"
.
But its quality is bleh
That said, the question itself is in dire need of improvement, and in its current shape I don't find it useful for the community.