#include<bits/stdc++.h>
#define M 1005
using namespace std;
int n,F[M],G[M];
int gcd(int a,int b){
    return !b?a:gcd(b,a%b);
}
int main(){
    for(int _=(scanf("%d",&_),_);_;_--){
        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 l1=0,l2=0;
        for(int i=0;i<n;i++)if(F[i])l1=i;
        for(int i=0;i<n;i++)if(G[i])l2=i;
        if(l1<l2)printf("0/1\n");
        else if(l1>l2)printf("1/0\n");
        else{
            int g=gcd(F[l1],G[l2]);
            printf("%d/%d\n",F[l1]/g,G[l2]/g);
        }
    }
    return 0;
}