import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        int multiFirst, multiSecond, c,aFirst, bFirst, numFirst=0, numSecond=0, denomFirst=0, denomSecond=0;
        boolean isIncorrect;
        Scanner scan = new Scanner(System.in);

        do {
            isIncorrect = false;
            System.out.println("Введите числитель первой дроби: ");
            try {
                numFirst = Integer.parseInt(scan.nextLine());
            }
            catch (Exception e) {
                System.err.println("Неверный ввод данных!");
                isIncorrect = true;
            }
        } while (isIncorrect);

        do {
            isIncorrect = false;
            System.out.println("Введите знаменатель первой дроби: ");
            try {
                denomFirst = Integer.parseInt(scan.nextLine());
            }
            catch (Exception e) {
                System.err.println("Неверный ввод данных!");
                isIncorrect = true;
            }
        } while (isIncorrect);

        do {
            isIncorrect = false;
            System.out.println("Введите числитель второй дроби: ");
            try {
                numSecond = Integer.parseInt(scan.nextLine());
            }
            catch (Exception e) {
                System.err.println("Неверный ввод данных!");
                isIncorrect = true;
            }
        } while (isIncorrect);

        do {
            isIncorrect = false;
            System.out.println("Введите знаменатель второй дроби: ");
            try {
                denomSecond = Integer.parseInt(scan.nextLine());
            }
            catch (Exception e) {
                System.err.println("Неверный ввод данных!");
                isIncorrect = true;
            }
        } while (isIncorrect);
        scan.close();

        multiFirst = numFirst * numSecond;
        multiSecond = denomFirst * denomSecond;
         if(multiSecond == 0){
             System.out.println("Нуль - знаменатель!");
         }
         if (multiFirst == 0) {
             System.out.println(multiFirst + "/" + multiSecond + "=0");
         }

         aFirst = multiFirst;
         bFirst = multiSecond;
         if (multiSecond > multiFirst) {
             c = multiFirst;
             multiFirst = multiSecond;
             multiSecond = c;
         }
         while (multiFirst % multiSecond != 0) {
             c = multiSecond;
             multiSecond = multiFirst % multiSecond;
             multiFirst = c;
         }
         System.out.print(aFirst + "/" + bFirst + "=" + aFirst / multiSecond);
         if (bFirst / multiSecond !=1) {
             System.out.println("/" + bFirst / multiSecond);
         }
    }
}