#include <bits/stdc++.h>

using namespace std;

int main(){
    int t,n,x,seata,seatb,ans1,ans2;
    cin>>t;
    while(t--){
        cin>>n;
        for(int i = 0;i < n;i++){
            cin>>x;
            if(x != 0){
                seata = i;
                ans1 = x;
            }
        }
        for(int i = 0;i < n;i++){
            cin>>x;
            if(x != 0){
                seatb = i;
                ans2 = x;
            }
        }
        if(seata > seatb){
            cout<<"1/0"<<endl;
        }
        else if(seata < seatb){
            cout<<"0/1"<<endl;
        }
        else{
            cout<<ans1/__gcd(ans1,ans2)<<"/"<<ans2/__gcd(ans1,ans2)<<endl;
        }
    }
    return 0;
}