#include <bits/stdc++.h>
using namespace std;

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

int n,f[1010],g[1010];
int x,y;

inline int gcd(int a,int b){
    while(b){
        int r=a%b;a=b;b=r;
    }
    return a;
}

int main(){
    for(int tt=read();tt;tt--){
        n=read();
        for(int i=0;i<n;i++) f[i]=read();
        for(int i=0;i<n;i++) g[i]=read();
        x=-1;for(int i=0;i<n;i++)if(f[i]>0) x=i;
        y=-1;for(int i=0;i<n;i++)if(g[i]>0) y=i;
        if(x<y){
            printf("0/1\n");continue;
        }
        if(x>y){
            printf("1/0\n");continue;
        }
        int z=gcd(f[x],g[y]);
        printf("%d/%d\n",f[x]/z,g[y]/z);
    }
}