//Problema Calculator, #1303, rezolvare 100P de Ouroboros
#include <iostream>
using namespace std;
int main()
{
long long a,b,r,aux;
char o;
cin>>a>>b;
cin>>o;
if (o=='+')
r=a+b;
else
if (o=='*')
r=a*b;
else
{
if (a<b)
{
aux=a;
a=b;
b=aux;
}
if (o=='-')
r=a-b;
else
r=a/b;
}
cout<<r;
return 0;
}