```This code creates a basic calculator with buttons for digits (0-9) and basic arithmetic operations (+, -, *, /). The `eval` function is used to evaluate the expression entered by the user. However, please note that using `eval` can be risky if you're planning to use this calculator on a production website, as it can potentially expose your site to security vulnerabilities.For a production-ready calculator, consider implementing a more secure and robust expression evaluation mechanism, and add error handling as necessary. Additionally, you can enhance the styling and functionality as per your requirements.
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