public class Exercice7 {
    public static void main(String args[]) {
    Rational r1 = new Rational(1,-12);
    Rational r2 = new Rational(-1,4);
    Rational r3 = new Rational(1, -4);
    Rational r4 = new Rational(-36);
    Rational r5 = new Rational(-7,0);
    Rational r6 = Rational.multiply(r1, r4);
    Rational r7 = new Rational(2,3);
    Rational r8 = new Rational(2,9);
    boolean b = Rational.greaterThan(r1, r2);
    System.out.println( b );  
    System.out.println( Rational.equalTo(r2, r3) ); 
    System.out.println( Rational.multiply(r1, Rational.ZERO) );
    System.out.println( r6 );
    System.out.println( r8.isIntegerMultipleOf( r7 ));
    System.out.println( r7.isIntegerMultipleOf( r8 ));

    }

}