#include <iostream>
using namespace std;
int main()
{
float a,b;
char c;
cin>>a>>c>>b;
switch(c)
{
case '+':
cout<< a+b <<endl;
break;
case '-':
cout<< a-b <<endl;
break;
case '*':
cout<< a*b <<endl;
break;
case '/':
cout<< a/b <<endl;
break;
}
return 0;
}