Mathematical Operation on Metric

I want to calculate distinct values of f_agenda and later multiply by 5.
For example:
f_agenda
gomez
garcia
martinez
pepe
garcia

distinct values of f_agenda = 4
and later 4 * 5
Result = 20

And I want to use visualization Metric

I don't think you can achieve this with the Metric from the visulizations menu. But it's doable with the metric version of TSVB. Get the metric as Unique Count and then add a Math aggregation where you can do the multiplication.