#include<bits/stdc++.h>
#define N 1005
using namespace std;
int n,m,a[N],b[N],c1[N],c2[N],tot1,tot2;
bool bo;
signed main(){
    int T;
    scanf("%d",&T);
    while(T--){
        bo=1;tot1=tot2=0;
        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=1;i<=n;i++)
            if(a[i]!=0)c1[++tot1]=i;
        for(int i=1;i<=n;i++)
            if(b[i]!=0)c2[++tot2]=i;
        if(c1[tot1]>c2[tot2]){puts("1/0");continue;}
        else if(c1[tot1]<c2[tot2]){puts("0/1");continue;}
        if(c1[tot1]==c2[tot2]){
            int t1=a[c1[tot1]],t2=b[c2[tot2]];
            int res=__gcd(t1,t2);
            t1/=res,t2/=res;
            printf("%d/",t1);printf("%d\n",t2);
        }
    }
    return 0;
}