Converting currency inline

Help
1

What I’m trying to do

I would like to be able to type anywhere something like:

  • Entrance: = RMB(72).
    and the result be rendered as:
  • Entrance: 72 RMB / 8.8 €.
    The conversion rate should be retrieved from a single source of truth for all the notes.

Things I have tried

I am new to Obsidian and not sure how to proceed. I have tried Inline Dataview JS but it seems I cannot call an external function. The closest so far is:

const rate = 8.2;
function RMB(x) {
  return `${x} RMB / ${(x / rate).toFixed(1)} €`;
}
dv.func = dv.func ?? {};
dv.func.RMB = RMB;
dv.paragraph("Entrance: " + dv.func.RMB(72));

which obviously is not practical.