#include
using namespace std;
int main()
{
long int n,n1,n2;
char ch;
cin>>ch;
while(ch!='X' && ch!='x')
{
if(ch=='+')
{
cin>>n1>>n2;
n=n1+n2;
cout<<n<<endl;
}
else if(ch=='-')
{
cin>>n1>>n2;
n=n1-n2;
cout<<n<<endl;
}
else if(ch=='*')
{
cin>>n1>>n2;
n=n1*n2;
cout<<n<<endl;
}
else if(ch=='/' && n2!=0)
{
cin>>n1>>n2;
n=n1/n2;
cout<<n<<endl;
}
else if(ch=='%' && n2!=0)
{
cin>>n1>>n2;
n=n1%n2;
cout<<n<<endl;
}
else
{
cout<<"Invalid operation. Try again.";
}
cin>>ch;
}
return 0;
}