#include <iostream>
#include <typeinfo>
#include <cmath>
using namespace std;
int main() {
    setlocale(LC_ALL, "Rus");
    bool isNotCorrect = false;
    int multiFirst, multiSecond, c ,aFirst, bFirst, numFirst, numSecond, denomFirst, denomSecond;

    do {
        cout << "Введите числитель 1 дроби\n";
        cin >> numFirst;
        if (cin.fail()) {
            isNotCorrect = true;
            cout << "Данные ввеены неккоректно" << endl << endl;
            cin.clear();
            while (cin.get() != '\n');
        }
        else {
            isNotCorrect = false;
        }
    } while (isNotCorrect);

    do {
        cout << "Введите числитель 2 дроби\n";
        cin >> numSecond;
        if (cin.fail()) {
            isNotCorrect = true;
            cout << "Данные ввеены неккоректно" << endl << endl;
            cin.clear();
            while (cin.get() != '\n');
        }
        else {
            isNotCorrect = false;
        }
    } while (isNotCorrect);

    do {
        cout << "Введите знаменатель 1 дроби\n";
        cin >> denomFirst;
        if (cin.fail()) {
            isNotCorrect = true;
            cout << "Данные ввеены неккоректно" << endl << endl;
            cin.clear();
            while (cin.get() != '\n');
        }
        else {
            isNotCorrect = false;
        }
    } while (isNotCorrect);

    do {
        cout << "Введите знаменатель 2 дроби\n";
        cin >> denomSecond;
        if (cin.fail()) {
            isNotCorrect = true;
            cout << "Данные ввеены неккоректно" << endl << endl;
            cin.clear();
            while (cin.get() != '\n');
        }
        else {
            isNotCorrect = false;
        }
    } while (isNotCorrect);

    multiFirst = numFirst * numSecond;
    multiSecond = denomFirst * denomSecond;
    if (multiSecond == 0) {
        cout << "Нуль знаменатель!\n ";
    }
    if (multiFirst == 0) {
        cout << multiFirst << "/" << multiSecond << "=0\n";
    }

    aFirst = multiFirst;
    bFirst = multiSecond;
    if (multiSecond > multiFirst) {
        c = multiFirst;
        multiFirst = multiSecond;
        multiSecond = c;
    }
    while (multiFirst % multiSecond != 0) {
        c = multiSecond;
        multiSecond = multiFirst % multiSecond;
        multiFirst = c;
    }
    cout << aFirst << "/" << bFirst << "=" << aFirst / multiSecond;
    if (bFirst / multiSecond != 1) {
        cout << "/" << bFirst / multiSecond << endl;
    }

    return 0;


}