#include<iostream>
#include<cstdio>
#include<algorithm>

int T;
int A[1050],B[1050],n1,n2;

int main(){
    scanf("%d",&T);
    while (T--){
        scanf("%d",&n1),n2=n1;
        for (int i=0;i<n1;i++) scanf("%d",&A[i]);
        for (int i=0;i<n2;i++) scanf("%d",&B[i]);
        while (!A[n1]) n1--;
        while (!B[n2]) n2--;
        if (n1>n2) puts("1/0");
        else if (n1<n2) puts("0/1");
        else{
            int g=std::__gcd(A[n1],B[n2]);
            printf("%d/%d\n",A[n1]/g,B[n2]/g);
        }
    }
}