//  B2_9

#include <iostream>
using namespace std;

template <class U, class V> U prod(const U &u, const V &v) {

  return u*v;
}

void main() {

  int x = 2, y = 4;
  double u = 2.6, v = -3.3;

  cout << "\n  product of " << x << " and " << y << " is " << prod(x,y);  
  cout << "\n  product of " << x << " and " << u << " is " << prod(x,u);
  cout << "\n  product of " << u << " and " << x << " is " << prod(u,x);
  cout << "\n  product of " << u << " and " << v << " is " << prod(u,v);

  cout << "\n\n";
}