mdiemer
click this option to download from there website (linux)..Hope its a latest pc/laptop(>2008) else download 32 bit option
64-bit .tgz package for other systems
run this command in Terminal
tar -xvzf softmaker-freeoffice-2018-944-amd64.tgz
it will create a folder. Inside the folder right click and select Open in Terminal and run this command (Hope you know how to install just in case if you dont know how to do that)
./installfreeoffice