#pragma GCC optimize(2)
#include<bits/stdc++.h>
//#define int long long
using namespace std;
const int N=1010;
int T,n,a[N],b[N];
signed main(){
    cin>>T;
    while(T--){
        cin>>n; int x;
        for(int i=1;i<=n;i++)    cin>>a[i];
        for(int i=1;i<=n;i++)    cin>>b[i];
        for(int i=n;i>=1;i--){
            if(a[i]!=0||b[i]!=0){
                x=i;    break;
            }
        }
    //    cout<<"x = "<<x<<endl;
        if(a[x]!=0&&b[x]==0)    cout<<"1/0"<<endl;
        else if(a[x]==0&&b[x]!=0)    cout<<"0/1"<<endl;
        else{
            int gcd=__gcd(a[x],b[x]);
            printf("%d/%d\n",a[x]/gcd,b[x]/gcd);
        }
    }
    return 0;
}