What's the error in this program?

Question

It is supposed to take a number from the user and either multiply by 4 or divide by 777 depending on the number entered by the user. Thanks!
#include <iostream>
using namespace std;

int main() {
cout << "Welcome " << "To " << "Numbers!" << endl;
int x=cin

if(x<666){x*4}
if()else(x>666){x/777}
return 0;
}

Answer 1

#include <iostream>
using namespace std;

int main() {
int x;
cout << "Welcome " << "To " << "Numbers!" << endl;
cin>>x;

if(x<666){
x=x*4;
cout<<x;
}
else if(x>666){
x=x/777;
cout<<x;
}
return 0;
}

Answer 2

P R Thank You!