import java.io.PrintStream;
import java.util.Scanner;
import type.lib.Fraction;

public class FractionArithmetic
{
   public static void main(String[] args)
   {
      PrintStream out = System.out;
      Scanner in = new Scanner(System.in);
      
      out.print("Numerator and denominator of first fraction: ");
      long num = in.nextLong();
      long den = in.nextLong();
      Fraction first = new Fraction(num, den);
      
      out.print("Numerator and denominator of second fraction: ");
      num = in.nextLong();
      den = in.nextLong();
      Fraction second = new Fraction(num, den);
      
      Fraction x = new Fraction(first);
      
      x.add(second);
      out.printf("%s + %s = %s%n", first, second, x);
      
      x.setFraction(first.getNumerator(), first.getDenominator());
      x.subtract(second);
      out.printf("%s - %s = %s%n", first, second, x);
      
      x.setFraction(first.getNumerator(), first.getDenominator());
      x.multiply(second);
      out.printf("%s * %s = %s%n", first, second, x);
      
      x.setFraction(first.getNumerator(), first.getDenominator());
      x.divide(second);
      out.printf("(%s) / (%s) = %s%n", first, second, x);
   }
}