hello, my problem is related to oracle packages, I need to know how to package functions and procedures, I'm desperate, so they sent me to do is complicated, is to make a packet by calculating the area and volume of a cube, I would just like to know the procedure. thank you very much in advance.

You CREATE a PACKAGE (aka package spec). In the package spec you declare the FUNCTIONS and PROCEDURES that are accessible via the PACKAGE. Then you CREATE the PACKAGE BODY. Within the package body you define the functions and procedures as they were declared in the package spec. As to why you need a package...that is not clear from your post. You do not necessarily need a package or a procedure or a function to simply calculate the volume of a cube. Unless this is an exercise and the requirement IS to calculate the volume of a cube utilizing those specific PL/SQL objects. HTH CJ

This is homework, which is why the package is necessary. The instructor wants the students to use what was just taught.