public class Rational extends Number implements Comparable<Rational> {

       public double doubleValue(){
               return (double)num1 / (double)den1;
       }
       public float floatValue(){
               return (float)num1 / (float)den1;
       }
       public int intValue(){
               return num1 / den1;
       }
       public long longValue(){
               return (long)num1 / (long)den1;
       }
       public int compareTo(Rational o){
               if (num1 * o.den1 < o.num1 * den1){
                       return 1;
               }
               else if (num1 * o.den1 > o.num1 * den1){
                       return -1;
               }
               else{
                       return 0;
               }
       }


       public Rational(int n1, int d1) {
               num1 = n1;
               den1 = d1;
       }

       public Rational add(Rational o) {
               int n1 = num1 * o.den1+ o.num1 * den1;
               int d1 = den1 * o.den1;

               return new Rational(n1 / gcd (n1, d1), d1/ gcd (n1,d1));
       }

       public Rational sub(Rational o) {

               int n1 = num1 * o.den1 - o.num1 * den1;
               int d1 = den1 * o.den1;
               return new Rational( n1 / gcd (n1, d1), d1 / gcd (n1, d1) );
       }

       public Rational mul(Rational o) {

               int n1 = num1 * o.num1;
               int d1 =  den1 * o.den1;

               return new Rational( n1/ gcd (n1,d1), d1 / gcd (n1, d1));
       }

       public Rational div(Rational o) {
               int totalx = (num1 * o.den1);
               int totaly = (den1 * o.num1);

               return new Rational (totalx / gcd (totalx , totaly), totaly / gcd
(totalx, totaly));
       }

       int gcd(int num1, int den1){
               int r, x;
               while (den1 != 0) {
                               x = den1;
                               r = (num1 % den1);
                               den1 = r;
                               num1 = x;
               }
               return num1;
       }

       public String toString() {
               if (den1 != 0)
                       return "(" + num1 + " / " + den1 + ")";
               else
                       return ("Undefined");
         }

       private int num1;
       private int den1;

/*public static void main(String[] args) {

   Rational a = new Rational(1, 14);
   Rational b = new Rational(1, 30);

   System.out.println(a + " + " + b + " = " + a.add(b));
   System.out.println(a + " - " + b + " = " + a.sub(b));
   System.out.println(a + " * " + b + " = " + a.mul(b));
   System.out.println(a + " / " + b + " = " + a.div(b));
       }*/
}