#include<bits/stdc++.h>
#define cir(x) memset(x,0,sizeof(x))
using namespace std;
const int N = 1e3+10;
int f[N],g[N];
int n,T,m;
int main(){
    scanf("%d",&T);
    while(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);
        for(int i=n;i>=1;i--)
        {
            if(f[i]!=0 || g[i]!=0){
                if(f[i] == 0){
                    printf("0/1\n");
                }
                else if(g[i] == 0){
                    printf("1/0\n");
                }else{
                    int d = __gcd(f[i],g[i]);
                    printf("%d/%d\n",f[i]/d,g[i]/d);
                }
                break;
            }
        }
    }
    return 0;
}