//Why I can't submit?
//fdsjkevhkjvhshfkjdsvc
#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;

#define M 1005

int T, n, f[M], g[M], Maxffff, Maxgggg;

int Get_gcd (int a, int b){
    if (! b)
        return a;
    return Get_gcd (b, a % b);
}
int main (){
    scanf ("%d", &T);
    while (T --){
        Maxffff = Maxgggg = 0;
        scanf ("%d", &n);
        for (int i = 1; i <= n; i ++){
            scanf ("%d", &f[i]);
            if (f[i])
                Maxffff = max (Maxffff, i);
        }
        for (int i = 1; i <= n; i ++){
            scanf ("%d", &g[i]);
            if (g[i])
                Maxgggg = max (Maxgggg, i);
        }
        if (Maxffff > Maxgggg)
            printf ("1/0\n");
        else if (Maxffff < Maxgggg)
            printf ("0/1\n");
        else{
            int GCD = Get_gcd (f[Maxffff], g[Maxgggg]);
            printf ("%d/%d\n", f[Maxffff] / GCD, g[Maxgggg] / GCD);
        }
    }
    return 0;
}