import java.util.Scanner;

public class App {
    public static void main(String[] args) {


        Scanner scan = new Scanner(System.in);
        System.out.println("Enter opperation:");
        String opperation = scan.next();

        System.out.println("Enter first number:");
        double numberOne = scan.nextDouble();

        System.out.println("Enter second number:");
        double numberTwo = scan.nextDouble();

        double sum = 0;


        switch(opperation) {
          case "-":
              sum = numberOne - numberTwo;
              break;
          case "+":
              sum = numberOne + numberTwo;
              break;
          case "/":
              sum = numberOne / numberTwo;
              break;
          case "*":
              sum = numberOne * numberTwo;
              break;
        }


        System.out.println("result:");
        System.out.println(sum);
    }
}