http://ftp.freenet.de/pub/ftp.vpn-ju...penoffice.org/

try using .deb binary from above url..

the easiest way it would be to add:

deb http://ftp.freenet.de/pub/ftp.vpn-ju...de/openoffice/ unstable main contrib

to /etc/apt/sources.list

run 'apt update' and then 'apt-get install openoffice.org1.1'