#include<iostream>
using namespace std;
int m(int x, int y)
{    
    int z = y;
    while(x%y!=0)
    {
        z = x%y;
        x = y;
        y = z;    
    }
    return z;
}
int main()
{
  int t;
  cin>>t;
  while(t--)
  {
        int n;
        cin>>n;
        int a1,b1;
        for(int i=0;i<n;i++)
        {
            int tmp;
            cin>>tmp;
            if(tmp!=0)
            {
                a1=i;
                b1=tmp;
            }
    }
        int a2,b2;
        for(int i=0;i<n;i++)
        {
            int tmp;
            cin>>tmp;
            if(tmp!=0)
            {
                a2=i;
                b2=tmp;
            }
    }
      if(a1<a2) cout<<"0/1"<<endl;
        else if(a1>a2) cout<<"1/0"<<endl;
    else
        {
            int tmp=m(b1,b2);
      cout<<b1/tmp<<"/"<<b2/tmp<<endl;
        }
      
  }
}