Product of numbers

#include <iostream>
using namespace std;
template<class T>
  T displayresult(T n1, T n2)
{
  cout<<n1<<endl<<n2<<endl<<n1*n2;
  return 0;
}
int main() {
float a,b;
  cin>>a>>b;
  displayresult(a,b);
return 0;
}