class ArithmeticWithFractions
{
    private static Fraction sum;
    private static Fraction difference;
    private static Fraction product;
    private static Fraction quotient;

    private static Fraction fraction1;
    private static Fraction fraction2;

    public static void main(String[] args)
    {

        String fraction1 = args[0];

        String[] splittedFraction1 = fraction1.split("/");

        String fraction2 = args[1];

        String[] splittedFraction2 = fraction2.split("/");



        int numerator1 = Integer.parseInt(splittedFraction1[0]);

        int denominator1 = Integer.parseInt(splittedFraction1[1]);

        int numerator2 = Integer.parseInt(splittedFraction2[0]);

        int denominator2 = Integer.parseInt(splittedFraction2[1]);


        fraction1 = new Fraction ( numerator1,  denominator1);

        fraction2 = new Fraction ( numerator2,  denominator2);


        Calculator calculator = new Calculator(fraction1, fraction2);

        sum = calculator.addFractions();

        product = calculator.multFractions();

        difference = calculator.subtFractions();

        quotient = calculator.divFractions();



    }

    public static void displayResults()
    {

        System.out.println("--- Basic operations with fractions ---\n");
        System.out.println("The sum: " + fraction1.numerator + " + " + fraction2.numerator + " = " + sum.numerator + "/" + sum.denominator + "\n");
        System.out.println("The difference: " + fraction1.numerator + " - " + fraction2.numerator + " = " + difference.numerator + "/" + difference.denominator + "\n");
        System.out.println("The product: " + fraction1.numerator + "/" + fraction1.denominator + " * " + fraction2.numerator + "/" + fraction2.denominator + " = " + product.numerator + "/" + product.denominator + "\n");
        System.out.println("The quotient: " + fraction1.numerator + " / " + fraction2.numerator + " = " + quotient.numerator + "/" + quotient.denominator + "\n");

        System.out.println("The program has terminated.");


    }


}

class Calculator
{
    private Fraction fraction1;
    private Fraction fraction2;


    public Calculator(Fraction fraction1, Fraction fraction2)
    {
        this.fraction1 = fraction1;
        this.fraction2 = fraction2;


    }

    public Fraction addFractions()
    {
        int a = (fraction1.numerator * fraction2.denominator) + ( fraction2.numerator * fraction2.denominator);

        int b = fraction1.denominator * fraction2.denominator;

        return new Fraction (a,b);
    }

    public Fraction subtFractions()
    {
        int a = fraction1.numerator - fraction2.numerator;

        int b = calCommonDenominator();

        return new Fraction (a, b);
    }

    public Fraction multFractions()
    {
        int a = fraction1.numerator * fraction2.numerator;

        int b = fraction1.denominator * fraction2.denominator;

        return new Fraction (a, b);
    }

    public Fraction divFractions()
    {
        int a = (fraction1.numerator * fraction2.denominator) + (fraction1.denominator * fraction2.numerator);

        int b = calCommonDenominator();

        return new Fraction();
    }

    private int calCommonDenominator()
    {
        int output;

        output = fraction1.denominator * fraction2.denominator;

        return output;


    }
}

class Fraction
{
    public int numerator;
    public int denominator;

    public Fraction(int n, int d )
    {
        this.numerator = n;

        this.denominator = d;
    }

    public Fraction()
    {
        this.numerator = 1;

        this.denominator = 2;
    }
}