#include<bits/stdc++.h>
using namespace std;

const int mx =1e3+5;
long long a[mx];
long long b[mx];

long long gcd(long long x,long long y)
{
    long long z=1;
    while (z)
    {
        z=x%y;
        x=y;
        y=z;
    }
    return x;
}

int main()
{
    int t;
    cin>>t;
    while (t--)
    {
        int n;
        cin>>n;
        for (int i=0;i<n;i++) cin>>a[i];
        for (int i=0;i<n;i++) cin>>b[i];
        for (int i=n-1;i>=0;i--)
        {
            if (a[i]!=0 || b[i]!=0)
            {
                if (a[i]==0)
                {
                    cout<<"0/1"<<endl;
                }
                else if (b[i]==0)
                {
                    cout<<"1/0"<<endl;
                }
                else
                {
                    long long gd = gcd(a[i],b[i]);
                    long long ans1 = a[i]/gd;
                    long long ans2=b[i]/gd;
                    cout<<ans1<<"/"<<ans2<<endl;
                }
                break;
            }
        }
    }
}