$ sudo apt-get remove liblapack3gf 

Uninstall liblapack3gf including dependent package

If you would like to remove liblapack3gf and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove liblapack3gf 

Use Purging liblapack3gf

If you use with purge options to liblapack3gf package all the configuration and dependent packages will be removed.

$ sudo apt-get purge liblapack3gf 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove liblapack3gf 

See Also,