Kenny Yip's is accessed here: https://www.youtube.com/watch?v=KM8PIiqq97c
Kenny mentions a security risk that many tutorials introduce with their calculator programs. He avoids using the JS eval function to run a string as if it were code. Hence, one of the reasons why I trust Kenny's tutorials.
I did not have the division nor the multiplication symbols, nor could I find them in my LibreOffice Writer. I asked Gemini for their hexadecimals and programmed them into my Special Characters favorites list for future use. They are U+F7 for division and U+D7 for multiplication. Yes, you could use a lowercase x for multiplication, but I rather like the multiplication symbol, especially when using its division partner symbol.
_ky is kenny's file _gem is the one I preferred
My browser is in dark mode. I would love to delve into the @media methods for preferred colors in light and dark modes. Meanwhile, I am searching for an option to view light modes without constantly changing my browser settings.