#include <iostream>

using namespace std;

int main()
{
int a;
int b;
char x;

cin>>a;
cin>>b;
cin>>x;

if (x=='/'){
    cout<<a/b;
}

if (x=='*'){
    cout<<a*b;
}

if (x=='+'){
    cout<<a+b;
}

if (x=='-'){
    cout<<a-b;
}


return 0;
}