#include <iostream>
using namespace std;

int main() 
{
    double a,b;
    char c;
    cin>>a;
    HI: cin>>c; switch (c)
    {
       case '+' :
        {
           cin>>b;
           a=a+b;
           goto HI;
        }
        
       case '-' :
        {
           cin>>b;
           a=a-b;
           goto HI;       
        }
        
       case '*' :
        {
           cin>>b;
           a=a*b;
           goto HI;
        }
 
        case '/' :
        {
           cin>>b;
           a=a/b;
           goto HI;
        }
    
        case '=' :
        {
           cout<<a;
        }
   }
    
    return 0;
}