import java.util.*;
public class Fraction {
    /**
     * declare attributes here
     */
    int numerator;
    int denominator;

    /**
     * declare constructor here
     */

    public Fraction(int numerator, int denominator){
        this.numerator = numerator;
        this.denominator = denominator;
    }
    /**
     * methods
     */
    private int gcd(int a, int b) {
        int temp;
        while (b!=0){
            temp = a % b;
            a = b;
            b = temp;
            }
        return a;
    }
    public int getNumerator(){
        return numerator;
    }
    public int getDenominator(){
        return denominator;
    }
    public void setNumerator(int number){
        numerator = number;
    }
    public void setDenominator(int number){
        denominator=number;
    }
    public Fraction reduce(){
        int n = gcd(numerator, denominator);
        numerator /=n;
        denominator /=n;
        return this;

    }
    // add
    public Fraction add(Fraction other) {
        int newNum = (this.numerator*other.denominator + this.denominator*other.numerator);
        int newDeno= this.denominator*other.denominator;
        this.numerator = newNum;
        this.denominator=newDeno;
        this.reduce();
        return this;
    }

    //subtract
    public Fraction subtract(Fraction other) {
        int newNum = (this.numerator*other.denominator - this.denominator*other.numerator);
        int newDeno= this.denominator*other.denominator;
        this.numerator = newNum;
        this.denominator=newDeno;
        this.reduce();
        return this;
    }

    // multiple
    public Fraction multiple(Fraction other) {
        int newNum = (this.numerator*other.numerator);
        int newDeno= this.denominator*other.denominator;
        this.numerator = newNum;
        this.denominator=newDeno;
        this.reduce();
        return this;
    }

    // divide
    public Fraction divide(Fraction other) {
        int newNum = (this.numerator*other.denominator);
        int newDeno= this.denominator*other.numerator;
        this.numerator = newNum;
        this.denominator=newDeno;
        this.reduce();
        return this;
    }
    public void printFraction(){
        System.out.println(this.numerator + "/" + this.denominator);
    }

    /**
     * compare this with other, notice that param is Object type
     */
    public boolean equals(Object obj) {
        return true;
    }
    public static void main(String agrs[]){
        Scanner myScan = new Scanner(System.in);
        // int numer = myScan.nextInt();
        // int denom = myScan.nextInt();
        // Fraction test = new Fraction(numer,denom);
        Fraction new1 = new Fraction(100,2);
        Fraction new2 = new Fraction(200,3);
        new1.multiple(new2);
        new1.printFraction();


    }
}