#include<bits/stdc++.h>
#define maxn 1050
using namespace std;

int n;
int fn,gn;
int f[maxn],g[maxn];

int main()    {
    int T;
    scanf("%d",&T);
    while (T--)    {
        scanf("%d",&n);
        for (int i=0;i<n;++i)    scanf("%d",f+i); 
        for (int i=0;i<n;++i)    scanf("%d",g+i); 
        for (fn=n-1;~fn;--fn)    
            if (f[fn])
                break;
        for (gn=n-1;~gn;--gn)    
            if (g[gn])
                break;
        if (fn<gn)
            puts("0/1");
        else
        if (fn>gn)
            puts("1/0");
        else    {
            int a=__gcd(f[fn],g[gn]);
            printf("%d/%d\n",f[fn]/a,g[gn]/a);
        }
    }
    return 0;
}