30 50
*

import java.util.Scanner; 
 
public class Main { 
  public static void main(String args[]){ 
   Scanner reader = new Scanner(System.in); 
   int m,n; 
   String a = "+",b = "-",c="*",d = "/"; 
   String s; 
   m = reader.nextInt(); 
   n = reader.nextInt(); 
    
   s = reader.next(); 
   switch(s){ 
   case"+":System.out.println(m+n);break; 
   case"-":System.out.println(m-n);break; 
   case"*":System.out.println(m*n);break; 
   case"/": 
    
    System.out.println(m/n); 
   break; 
    
   } 
  } 
    
  }