#include <stdlib.h>
using namespace std;
int main ()
{
char c,flag;
double a,b;
while (1)
{
cin>>a>>c>>b;
flag=1;
switch(c)
{
case '+':a+=b;break;
case '-':a-=b;break;
case '*':a*=b;break;
case '/':if(b==0){cout<<"出錯！\n";flag=0;}
else a/=b;break;
default : cout<<"輸入有誤！\n";flag=0;return 0;
}
if(flag)
cout<<"="<<a<<endl;
}
}