#include<iostream>
using namespace std;
int main()
{
do{
int x;
int y;
int z;
string f;
cin >> x;
cin >> f;
cin >> y;
if (f == "+" )
{
z = x + y;
cout << " z = " << z;
}
if (f == "-")
{
z = x - y;
cout << " z = " << z;
}
if (f == "*")
{
z = x * y;
cout << " z = " << z;
}
if (f == "/" && y < 1 && y > -1){
cout << "it is not divisible by zero " << endl;
}
if (f == "/" ) {
z = x / y;
cout << "z = " << z;
}
if (z == 0 ) {
cout << " my calculator cannot calculate this equation " <<endl;
}
}
while(true);
}