Is it possible to cast NaN from "NaN" (string) ( using toFixed() )

Question

So I got why to fixed returns a String, with this in mind is it possible to cast the "NaN" string into NaN to keep the following expression workable?

var numberWithPrecission = (1*"A").ToFixed(2) || 0; 

Answer 1

As suggested:

var numberWithPrecission = (1*"A" || 0).toFixed(2);