#include<bits/stdc++.h>

#define pb push_back
#define mp make_pair
#define fi first
#define se second

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

bool chkmax(int &x,int y){return x<y?x=y,true:false;}
bool chkmin(int &x,int y){return x>y?x=y,true:false;}

int readint(){
    int x=0,f=1; char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
    return x*f;
}

int n;
int a[1005],b[1005];

ll gcd(ll x,ll y){return y==0?x:gcd(y,x%y);}

int main(){
    int T=readint();
    while(T--){
        n=readint();
        for(int i=0;i<n;i++) a[i]=readint();
        for(int i=0;i<n;i++) b[i]=readint();
        int ma=n,mb=n;
        while(ma&&a[ma-1]==0) ma--;
        while(mb&&b[mb-1]==0) mb--;
        if(ma!=mb){
            if(ma>mb) printf("1/0\n");
            else printf("0/1\n");
            continue;
        }
        ll g=gcd(a[ma-1],b[mb-1]);
        a[ma-1]/=g,b[mb-1]/=g;
        printf("%d/%d\n",a[ma-1],b[mb-1]);
    }
    return 0;
}