This example demonstrates a minimal web page that combines HTML, CSS, and JavaScript to display a static message and trigger a browser alert. The page shows a heading rendered with black background and white text via the external `info.css` stylesheet. It also includes inline JavaScript that performs a simple arithmetic operation and logs the result to the console, alongside the `java.js` script which invokes the `alert` function. The example uses no external libraries or data sources, relying solely on native DOM elements and standard JavaScript APIs.