#include <iostream>
using namespace std;


int main()
{
    int T;
    int n;
    int *p1, *p2;
    int now;
    bool f = false;

    cin >> T;

    for (int i = 0; i < T; i++)
    {
        cin >> n;

        p1 = (int*)malloc(sizeof(int)*n);
        p2 = (int*)malloc(sizeof(int)*n);
        f = false;
        now = n - 1;

        for (int i = 0; i < n; i++)
            cin >> p1[i];

        for (int i = 0; i < n; i++)
            cin >> p2[i];

        while (!f)
        {
            if (p1[now] != 0 && p2[now] != 0)
            {
                int temp, r;
                int a = p1[now];
                int b = p2[now];
                if (a < b)
                {
                    temp = a;
                    a = b;
                    b = temp;
                }
                while (b != 0)
                {
                    r = a%b;
                    a = b;
                    b = r;
                }

                cout << p1[now]/a << "/" << p2[now]/a << endl;
                f = true;
            }

            if (p1[now] == 0 && p2[now] != 0)
            {
                cout << "0/1" << endl;
                f = true;
            }

            if (p1[now] != 0 && p2[now] == 0)
            {
                cout << "1/0" << endl;
                f = true;
            }

            now--;
        }
        
        


    }
    return 0;
}