#include<bits/stdc++.h>
using namespace std;
int T,n,f[1005],g[1005],x;
int gcd(int a,int b){
    if(a==0)return b;
    if(b==0)return a;
    if(a%b==0)return b;
    return gcd(b,a%b);
}
int main(){
    scanf("%d",&T);
    for(;T;T--){
        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]);
        while(!f[n] && !g[n])n--;
        x=gcd(f[n],g[n]);
        printf("%d/%d\n",f[n]/x,g[n]/x);
    }
}