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

#define reg register
typedef long long ll;
#define rep(i,a,b) for(int i=a,i##end=b;i<=i##end;++i)
#define drep(i,a,b) for(int i=a,i##end=b;i>=i##end;--i)

char IO;
int rd(){
    int s=0,f=0;
    while(!isdigit(IO=getchar())) if(IO=='-') f=1;
    do s=(s<<1)+(s<<3)+(IO^'0');
    while(isdigit(IO=getchar()));
    return f?-s:s;
}

const int P=1e9+7;

int gcd(int a,int b){ return b==0?a:gcd(b,a%b);} 


int main(){
    rep(kase,1,rd()) {
        int n=rd();
        int a=-1,b=-1,c,d;
        rep(i,0,n-1) {
            int t=rd();
            if(t) a=i,c=t;
        }
        rep(i,0,n-1) {
            int t=rd();
            if(t) b=i,d=t;
        }
        if(a<b) puts("0/1");
        else if(a>b) puts("1/0");
        else {
            int g=gcd(c,d);
            printf("%d/%d\n",c/g,d/g);
        }
    }
}