Aggregating all module summaries.

Analysis Type Global Variable: Static Analysis

All Summaries (from prior_outputs using [*]):
This module exports a function  that returns a personalized greeting and a constant string . It also includes an internal helper function that is not exported.
The purpose of the given JavaScript module is to provide a utility for basic arithmetic operations, specifically addition through a named export and multiplication through a class method on a default export.

Aggregation instruction: Please combine these summaries into a single paragraph.