#include<bits/stdc++.h>
using namespace std;
int test,n,a[1111],b[1111],A,B,d;
int gcd(int a,int b)
{
    if (!b) return a;
    return gcd(b,a%b);
}
int main()
{
    scanf("%d",&test);
    while(test--)
    {
        scanf("%d",&n);
        for (int i=1;i<=n;i++) scanf("%d",&a[i]);
        for (int i=1;i<=n;i++) scanf("%d",&b[i]);
        for (int i=n;i>=1;i--)
        {
            if (a[i]) 
            {
                A=i;
                break;
            }
        }
        for (int i=n;i>=1;i--)
        {
            if (b[i])
            {
                B=i;
                break;
            }
        }
        if (A<B) printf("0/1\n");
        else if (A>B) printf("1/0\n");
        else
        {
            d=gcd(a[A],b[B]);
            printf("%d/%d\n",a[A]/d,b[B]/d);
        }
    }
    return 0;
}