PL/SQL Procedure Need Help seriously

this is my procedure whereby you input a date value into the procedure to 
calculate ur age.

variable g_age number
create or replace procedure cal_age
( mybirthdate in date 
  myage out number )
is
begin
myage := (sysdate - mybirthdate)/365
:g_age := myage;
end;
print g_age

Here is my problem
how do i input a date value into my procedure..

i tried
execute cal_age('14-NOV-84');
but it return an error and i know it wrong as well.
but i cant embed a to_date function within the parenthesis.

so any1 please help ?


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