Multily three numbers given by user

Write a program that accept the three integers from the user and display their multiply?

#include<iostream.h>
int main()
                {
long num1,num2,num3,mul;
cout<<"\n"<<" Enter first number = ";
cin>>num1;
cout<<"\n"<<" Enter second number = ";
cin>>num2;
cout<<"\n"<<" Entera third number = ";
cin>>num3;
mul=num1*num2*num3;
cout<<"\n\n"<<" Mul = "<<mul;
system("pause");
return 0;
}