PL/SQL :: How To Return Multiples Values Using Functions

I am using functions to return multiple values of two rows or multiple rows.

For example emp id = 100 and i need to return the value for this(empid) input and output of this first_name and salary.

I am tried in this way below but got errors (ORA-00932: inconsistent datatypes: expected NUMBER got HR.EMP_TYPE)

create or replace type emp_type as object(first_name varchar2(20),salary number);

create or replace function f1(empid in number)
return emp_type
as
emp_record emp_type;
begin
select first_name,salary into emp_record.first_name,emp_record.salary from employees where employee_id = empid ;
return emp_record;
end;
/

select f1(100) from dual;