#include <iostream>

using namespace std;

int main()
{
    int a;
    int b;
    int e;
    cin>>a;
    cin>>b;
    cin>>e;
    char c;
    cin>>c;
      if(c=='+'){
        e = a+b;
      }else{
        if(c=='-'){
            e = a-b;
        }else{
            if(c == '*'){
                e = a * b;
            }else{
                if (c == '/'){
                    e = a / b;
                }
            }
        }
      }
      cout<<e;


    return 0;
}