PowerToys/doc/devdocs/modules/launcher/plugins/calculator.md

Calculator Plugin

The Calculator plugin as the name suggests is used to perform calculations on the user entered query.

CalculateHelper

• The CalculateHelper.cs class checks to see if the user entered query is a valid input to the calculator and only if the input is valid does it perform the operation.
• It does so by matching the user query to a valid regex.

CalculateEngine

• The main computation is done in the CalculateEngine.cs file using the Mages library.

var result = CalculateEngine.Interpret(query.Search, CultureInfo.CurrentUICulture);

CalculateResult

• The class which encapsulates the result of the computation.
• It comprises of the Result and RoundedResult properties.

Score

The score of each result from the calculator plugin is 300.