import java.util.*;
public class Main {
    public static void main(String args[]) {
       Scanner sc = new Scanner(System.in);
\
        char ch = '+';
        while(ch!='x'&&ch!='X'){
            ch = sc.next().charAt(0);
            switch(ch){
                case '+':{

                    long n1 = sc.nextLong();
                    long n2 = sc.nextLong();
                    long res = n1+n2;
                    System.out.println(res);
                    break;
                }
                case '-':{
                    long n1 = sc.nextLong();
                    long n2 = sc.nextLong();
                    long res = n1-n2;
                    System.out.println(res);
                    break;
                }
                case '*':{
                    long n1 = sc.nextLong();
                    long n2 = sc.nextLong();
                    long res = n1*n2;
                    System.out.println(res);
                    break;
                }
                case '/':{
                    long n1 = sc.nextLong();
                    long n2 = sc.nextLong();
                    long res = n1/n2;
                    System.out.println(res);
                    break;
                }
                case '%':{
                    long n1 = sc.nextLong();
                    long n2 = sc.nextLong();
                    long res = n1%n2;
                    System.out.println(res);
                    break;
                }
                case 'x': case 'X' :{
                    sc.close();
                    break;
                }
                default:{
                    System.out.println("Invalid operation. Try again.");
                    break;
                }
            }
        }

    }
}