How to improve calculator with Angular 1.7?

Question

JavaScript

The task is to write a calculator in Angular 1.7. Now I have written most of the standard operations in js and fix all sorts of bugs, but I need to use Angular. Tell me, or better yet, give an example of how you can use the capabilities of Angular specifically for the calculator?)

Answer 1

https://docs.angularjs.org/tutorial/step_00

Answer 2

https://metanit.com/web/angular/1.1.php