#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
#define rep(i,s,t) for(register int i=s;i<=t;++i)
#define _rep(i,s,t) for(register int i=s;i>=t;--i)
int T,n,m,s,t;
const int N=1e5+11;
int a[N],b[N];
int gcd(int a,int b){
    return b?gcd(b,a%b):a;
}
int main(){
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        rep(i,0,n-1)
            scanf("%d",a+i);
        s=n;
        while(!a[s])--s;
        rep(i,0,n-1)
            scanf("%d",b+i);
        t=n;
        while(!b[t])--t;
        if(s==t){
            int g=gcd(a[s],b[t]);
            printf("%d/%d\n",a[s]/g,b[t]/g);
        }
        else if(s>t)printf("1/0\n");
        else printf("0/1\n");
    }
    return 0;
}
/*
5
2
1 1 2 2 2 2 4 4
*/