#include<bits/stdc++.h>
#define Ms(a,b) memset(a,b,sizeof a)
#define db(x) cout<<#x<<"="<<x<<endl;
#define db2(x,y) cout<<#x<<"="<<x<<" "<<#y<<"="<<y<<endl;
#define db3(x,y,z) cout<<#x<<"="<<x<<" "<<#y<<"="<<y<<" "<<#z<<"="<<z<<endl;
using namespace std;
int T,n;
int a[1005],b[1005];
int main() {
    scanf("%d",&T);
    while(T--){
        scanf("%d",&n);
        for(int i=0;i<n;i++)scanf("%d",&a[i]);
        for(int i=0;i<n;i++)scanf("%d",&b[i]);
        int t1=n-1,t2=n-1;
        while(!a[t1])t1--;
        while(!b[t2])t2--;
        if(t1<t2)puts("0/1");
        else if(t1>t2)puts("1/0");
        else printf("%d/%d\n",a[t1]/__gcd(a[t1],b[t2]),b[t2]/__gcd(a[t1],b[t2]));
    }
    return 0;
}