Compute distance light travels using long variables

Here is a Java Program to Compute distance light travels using long variables

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class Light {   public static void main(String args[]) {     int lightspeed;     long days;     long seconds;     long distance;       // approximate speed of light in miles per second     lightspeed = 186000;       days = 1000; // specify number of days here       seconds = days * 24 * 60 * 60; // convert to seconds       distance = lightspeed * seconds; // compute distance       System.out.print("In " + days);     System.out.print(" days light will travel about ");     System.out.println(distance + " miles.");   } }

Output of Above Java Program
In 1000 days light will travel about 16070400000000 miles.