Create a calculator using javascript, HTML, and CSS. The calculator must support the following functions: 1. Addition of two digits. 2. Subtraction of two digits. 3. Multiplication of two digits. 4. Division of two digits. 5. Factorial of a digit. 6. Permutation of two digits. 7. Combination of two digits. 8. Modulous of two digits. All 8 functions must be fully implemented The result must be displayed on the HTML page having a textbox. Also, there must be an interactive design, so use your creative thinking and make an interactive and appealing UI for the calculator. Hint: document.querySelector(), document.getElementsByClassName(), document.getElementById() functions might be useful.

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