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This code adds an onclick attribute to each key that triggers a playSound function when clicked. The playSound function creates an Audio object with the specified filename and plays it. Note that this code assumes you have sound files for each key in the same directory as the HTML file, and that each file is named after the note it represents (e.g. C4.mp3 for the C key in the fourth octave). You can customize the sound files and filenames as needed. Ali Raza Panjwani create calcutor on html Sure, here's a simple calculator example using HTML, CSS, and JavaScript: php Copy code