Calculate the volume or number of particles in a mas using moles

gas_particles_calculator.cpp

/* Copyright (c) 2014 dillmo
 * Licensed under the MIT License(http://opensource.org/licenses/MIT)
 *
 * A program I made for chemistry class. It calculates how many particles there
 * are in a gas in moles, based on its volume in liters.
 */

#include <iostream>
using namespace std;

int main()
{
  double volume, answer;

  cout << "What is the volume of your gas?" << '\n';
  cin >> volume;

  answer = volume * (1/22.4);

  cout << scientific << answer << " mol" << '\n';

  return 0;
}

gas_volume_calculator.cpp

/* Copyright (c) 2014 dillmo
 * Licensed under the MIT License (http://opensource.org/licenses/MIT)
 *
 * A program I made for chemistry class. It calculates the volume of a gas
 * based on the number of particles in moles.
 */

#include <iostream>
using namespace std;

int main()
{
  double moles, answer;

  cout << "How many particles are there in moles?" << '\n';
  cin >> moles;

  answer = moles * 22.4;

  cout << answer << " L" << '\n';

  return 0;
}