#include
using namespace std;
int main() {
char ch;
do {
cin>>ch;
int n1;
int n2;
cin>>n1;
cin>>n2;
int ans;
if(ch==’’) {
ans =n1n2;
}
else if(ch==’+’) {
ans=n1+n2;}
else if(ch==’*’) {
ans=n1-n2;}
else if(ch==’/’){
if(n2==0){
cout<<“Invalid”;}
else{
ans=n1/n2;}}
else if(ch==’%’){
if(n2==0){
cout<<“Invalid”;}
else{
ans=n1%n2;}}
else if(ch==‘x’ || ch==‘X’) {
break;
}
else {
cout<<“Invalid Operation Try Again”;
}
cout<<ans<<endl;
}while(ch!=‘x’ || ch!=‘X’);
return 0;
}