#include <cstdio>
#include <iostream>
using namespace std;
const int maxn = 1005;
int a[maxn],b[maxn];
int gcd(int a,int b){
    if(b == 0){
        return a;
    }
    return gcd(b,a%b);
}
int main(){
    int t,n;
    scanf("%d",&t);
    while(t--){
        scanf("%d",&n);
        for(int i = 0;i < n;i++) scanf("%d",&a[i]);
        for(int i = 0;i < n;i++) scanf("%d",&b[i]);
        int x,y;
        int m = n - 1;
        x = a[m],y = b[m];
        while(x==0&&y==0){
            x = a[--m];
            y = b[m];
        }
        if(x == 0) printf("0/1\n");
        else if(y == 0) printf("1/0\n");
        else{
            int z = gcd(x,y);
            printf("%d/%d\n",x/z,y/z);
        }
    }
}