#include<bits/stdc++.h>

using namespace std;

#define N 1200

int t,n,a[N],b[N],na,nb;

int main(){
    scanf("%d",&t);
    while (t--){
        scanf("%d",&n);
        for (int i=1;i<=n;++i){
            scanf("%d",a+i);
            if (a[i]) na=i;
        }
        for (int i=1;i<=n;++i){
            scanf("%d",b+i);
            if (b[i]) nb=i;
        }
        if (na<nb) puts("0/1");
        else if (na>nb) puts("1/0");
        else if (na==nb){
            int d=__gcd(a[na],b[nb]);
            printf("%d/%d\n",a[na]/d,b[nb]/d);
        }
    }
    
    return 0;
}