See SocialCalc for the full activity description.
However, you can easily install "Gnumeric" which is an open source version of Excel. Enter Terminal activity. Type "su" and <enter> Type "yum install gnumeric" Follow the prompts.
When it finishes, just type "gnumeric" from the command prompt and it you then have a fully featured spreadsheet program! (As a note, I'm using build 766 (I think), I've also installed "debian as an upgrade" as an alternate boot with XFCE).