import java.util.Scanner;
interface employee {
  public void setOT(float s);
  public float calOT(int h, float s);
}
public class InterfaceTest implements employee {  
  public void setOT(float s) {
    System.out.println("OT RATE  = "+ s + " BAHT/HR.");
  }
  public float calOT(int h,float s){
      return h*s;
  }
  public static void main(String[] args) {
    InterfaceTest emp = new InterfaceTest();
    Scanner scan = new Scanner(System.in);
    System.out.print("Enter OT RATE (BAHT/HR.) >>> ");
    float salary = scan.nextFloat();
    System.out.print("Enter OT HOUR >>> ");
    int hr = scan.nextInt();
    System.out.println("OT HOUR  = " + hr + " HR.");
    emp.setOT(salary);
    System.out.println("TOTAL OT = "
            + emp.calOT(hr,salary) + " BAHT");
  }
}