#include<bits/stdc++.h>
#define debug(x) cerr<<"\tDEBUG: "<<#x<<" = "<<(x)<<endl
#define debug2(a,x) cerr<<#a<<"\tDEBUG: "<<#x<<" = "<<(x)<<endl
using namespace std;
const int maxn=1e3+100;
int n;
int f[maxn],g[maxn];
int gcd(int a,int b){
    return !b?a:gcd(b,a%b);
}
int main(){
//    freopen("data.in","r",stdin);
//    freopen("data.out","w",stdout);

//    freopen("rabbits.in","r",stdin);
//    freopen("rabbits.out","w",stdout);
    for(int _=(cin>>_,_);_--;){
        scanf("%d",&n);
        for(int i=1;i<=n;i++)
            scanf("%d",&f[i]);
        for(int i=1;i<=n;i++)
            scanf("%d",&g[i]);
        int a,b;
        for(int i=n;i>=1;i--){
            if(f[i]!=0||g[i]!=0){
                a=f[i];
                b=g[i];
                break;
            }
        }
        int g=gcd(a,b);
        printf("%d/%d\n",a/g,b/g);
    }
    return 0;
}