class Light{
  public static void main(String args[]) {
    int lightspeed;
    long days;
    long seconds; 
    long distance;
    //距離=光速×時間(以秒為單位)
    lightspeed = 186000;
    days = 1000;                    // 給出天數
    seconds = days * 24 * 60 * 60;     // 轉換成秒
    distance = lightspeed * seconds;    // 計算距離
    System.out.print("In " + days);
    System.out.print(" days light will travel about ");
    System.out.println(distance + " miles.");
  }
}