import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
  public static void main(String[] args) {
    System.out.println(calcolatrice(5, 2, "*"));
  }
  
  public static int calcolatrice(int a, int b, String op){
    int ris = 0;
    switch(op){
      case "+":
        ris = a+b;
        break;
      case "-":
        ris = a-b;
        break;
      case "*":
         ris = a*b;
        break;
      case "/":
        ris = a/b;}
    return  ris;
  }     
}