PL/SQL Function Example 2 in Oracle

Example 2 of PL/SQL Function:

create or replace function find_area
(Len in number, Wid in number)
return number
as
varea number;
begin
varea := Len * Wid;
return varea;
end;

SQL> select find_area (10, 30) area from dual;

AREA
---------
300