/***
 *                  ___====-_  _-====___
 *            _--^^^#####//      \\#####^^^--_
 *         _-^##########// (    ) \\##########^-_
 *        -############//  |\^^/|  \\############-
 *      _/############//   (@::@)   \\############\_
 *     /#############((     \\//     ))#############\
 *    -###############\\    (oo)    //###############-
 *   -#################\\  / VV \  //#################-
 *  -###################\\/      \//###################-
 * _#/|##########/\######(   /\   )######/\##########|\#_
 * |/ |#/\#/\#/\/  \#/\##\  |  |  /##/\#/  \/\#/\#/\#| \|
 * `  |/  V  V  `   V  \#\| |  | |/#/  V   '  V  V  \|  '
 *    `   `  `      `   / | |  | | \   '      '  '   '
 *                     (  | |  | |  )
 *                    __\ | |  | | /__
 *                   (vvv(VVV)(VVV)vvv)
 *                        神兽保佑
 *                       代码无BUG!
 ***/

#include<set>
#include<map>
#include<stack>
#include<utility>
#include<ctime>
#include<string>
#include<cstdio>
#include<cmath>
#include<vector>
#include<cstdlib>
#include<queue>
#include<cstring>
#include<sstream>
#include<algorithm>
#include<iostream>
#define pf printf
#define INF 0x3f3f3f3f
#define scc(x) scanf("%c",&x);
#define scd(x) scanf("%d", &x)
#define scs(x) scanf("%s", x)
#define scf(x) scanf("%lf", &x)
#define scl(x) scanf("%lld", &x)
#define mem(a,x) memset(a, x, sizeof(a))
#define rep(i,s,e) for(ll i = s; i < e; i++)
#define dep(i,e,s) for(ll i = e; i >= s; i--)
#define rush() int T;scanf("%d",&T);while(T--)
using namespace std;
typedef long long ll;
const double PI = acos(-1.0);
const int MAXN = 4000 + 10;
const int mod = 998244353;
const int inf=1e9+7;
const int mo=1e9+7;
const int N=1e6+10;


int i,j,k,n,m,ans;
int a[MAXN],b[MAXN];
int main()
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%d",&n);
        int maxx1=-1,maxx2=-1;
        int num1,num2;
        for(i=0;i<n;i++)
            scanf("%d",&a[i]);
        for(i=0;i<n;i++)
            scanf("%d",&b[i]);
        for(i=n-1;i>=0;i--)
        {
            if(a[i]!=0)
            {
                maxx1=i;
                num1=a[i];
                break;
            }
        }
        for(i=n-1;i>=0;i--)
        {
            if(b[i]!=0)
            {
                maxx2=i;
                num2=b[i];
                break;
            }
        }
        if(maxx1>maxx2)
            printf("1/0\n");
        else if(maxx1==maxx2)
        {
            int sa=__gcd(num1,num2);
            printf("%d/%d\n",num1/sa,num2/sa);
        }
        else
            printf("0/1\n");
    }
}