I use this in a cronjob to turn a raspberry pi screen off at night and back on in the morning:

wlr-randr --output "HDMI-A-1" --off

wlr-randr --output "HDMI-A-1" --on

I’ve also go this environment variable set but I don’t know if it is needed outside of cron:

XDG_RUNTIME_DIR=/run/user/1000

If you want a calculator, try an actual calculator or a website that actually does math like Wolfram alpha.

A chatbot can’t actually do math. It can only give you an answer that looks right because it has no fundamental understanding of what “right” actually is.