Step 1: Create an HTML file with: Step 2: Two input fields for numbers. Step 3: A dropdown menu for operation selection. Step 4: A button to perform the calculation. Step 5: A result display area.
/project-root │ ├── index.html # Main HTML page ├── dashboard.html # Linked dashboard page ├── calendar.html # Linked calendar page ├── profile.html # Linked profile page │ ├── style.css # Styling ...