import java.util.;
public class Main {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
char ch = sc.next().charAt(0);
do{
int a = sc.nextInt();
int b = sc.nextInt();
int result=0;
//do
switch(ch){
case ‘x’:
break;
case ‘X’:
break;
case ‘+’:
result = a+b;
System.out.println(result);
break;
case ‘-’:
result=a-b;
System.out.println(result);
break;
case '’:
result=a*b;
System.out.println(result);
break;
case ‘%’:
result = a%b;
System.out.println(result);
break;
case ‘/’:
result=a/b;
System.out.println(result);
break;
default:
System.out.println("'Invalid operation. Try again");
break;
}}while(ch!='\0');
}
}