MS Office for MacBook not loading

I bought MS Office 365 for my MAcBook and once downloading it, when I try and open to load it, I get the following error: The document “Microsoft_365_and_Office_16.76.23081101_Installer-1.pkg” could not be opened. zoom.us cannot open files in the “Installer package archive” format"

Not sure why it's trying to use "Zoom" to load it. What am I doing wrong?

Thank You