#include<bits/stdc++.h>
#define ll long long
#define N 2005
using namespace std;
int T,n,f[N],g[N];
int main(){
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        for(int i=1;i<=n;i++)
            scanf("%d",&f[i]);
        for(int i=1;i<=n;i++)
            scanf("%d",&g[i]);
        int p1=n,p2=n;
        while(f[p1]==0) p1--;
        while(g[p2]==0) p2--;
        if(p1>p2) printf("1/0\n");
        else if(p2>p1) printf("0/1\n");
        else printf("%d/%d\n",f[p1]/__gcd(f[p1],g[p2]),g[p2]/__gcd(f[p1],g[p2]));
    }
}