In steps 1 to 9, we created an ASP.NET core project. We selected an empty project for this recipe. After that, in steps 10 to 17, we installed the library created in the previous chapter. We used the NuGet Package Manager to install it and we also confirmed that the library was successfully installed.

In step 20, we referenced the library using a using directive. Finally, in step 22, we created an instance of the Calculator class and stored it in a variable. Finally, we sent the output to the browser using the WriteAsync() method. In step 24, we tested our application in the browser.