This is a complete and responsive code for a basic calculator built using HTML, CSS, and JavaScript. It features a simple user interface with a text input field for displaying the result and a series of buttons for inputting numbers and operators. The calculator can perform basic arithmetic operations such as addition, subtraction, multiplication, and division. The JavaScript code includes three functions for appending values to the result field, clearing the result field, and performing calculations. This calculator code can be used as a standalone tool for basic arithmetic calculations or as a starting point for building more complex calculators.