#include <bits/stdc++.h>

using namespace std;

int main() {
    int case_cnt; scanf("%d", &case_cnt);
    while (case_cnt--) {
        int n; scanf("%d", &n);
        
        vector<int> f, g;
        
        for (int i = 0; i < n; ++i) {
            int x; scanf("%d", &x); f.push_back(x);
        }
        for (int i = 0; i < n; ++i) {
            int x; scanf("%d", &x); g.push_back(x);
        }
        
        while (f.back() == 0 && g.back() == 0) {
            f.pop_back();
            g.pop_back();
        }
        int u = f.back(), v = g.back();
        int t = __gcd(u, v);
        u /= t;
        v /= t;
        printf("%d/%d\n", u, v);
    }
    
    return 0;
}