#include<bits/stdc++.h>
using namespace std;
const int M=1001;
int T,n,A[M],B[M];
void Solve(){
    scanf("%d",&n);
    int ma=0;
    for(int i=1;i<=n;i++){
        scanf("%d",&A[i]);
        if(A[i])ma=max(ma,i);
    }
    for(int i=1;i<=n;i++){
        scanf("%d",&B[i]);
        if(B[i])ma=max(ma,i);
    }
    int a=A[ma],b=B[ma];
    int c=__gcd(a,b);
    a/=c,b/=c;
    printf("%d/%d\n",a,b);
}
int main(){
    scanf("%d",&T);
    while(T--)Solve();
}