#include <bits/stdc++.h>
using namespace std;
const int maxn = 1010;
int gcd(int a,int b) {if (a==0) return b; else return b==0?a:gcd(b,a%b);}
int f[maxn],g[maxn];
int main(void) {
    int T; scanf("%d",&T);
    while (T--) {
        int n; scanf("%d",&n);
        for (int i=0;i<n;i++) scanf("%d",&f[i]);
        for (int i=0;i<n;i++) scanf("%d",&g[i]);
        int a=0,b=0;
        for (int i=n-1;i>=0;i--) if (f[i] || g[i]) {a=f[i],b=g[i];break;}
        int g=gcd(a,b);
        printf("%d/%d\n",a/g,b/g);
    }
    return 0;
}