#include <iostream>
#include <vector>
using namespace std;
typedef long long LL;
//最大公約数
LL gcd(LL a, LL b)
{
	if (a<0){
		a=-a;
	}
	if (b<0){
		b=-b;
	}
    return b == 0 ? a : gcd(b, a % b);
}

int main(int argc, char* argv[])
{
	int i,n1,n2;
	cin>>n1;
	LL A,B;
	LL A1;
	cin>>A1;
	LL A2=1;
	for (i=2;i<=n1;i++){
		cin>>A;
		A2*=A;
	}
	cin>>n2;
	LL B1;
	cin>>B1;
	A2*=B1;
	LL B2=1;
	for (i=2;i<=n2;i++){
		cin>>B;
		if (i%2==0){
			A1*=B;
		}else{
			A2*=B;
		}
	}
	LL C=gcd(A1,A2);
	if (A1<0 &&A2<0){
		A1=-A1;
		A2=-A2;
	}
	cout<<A1/C<<" "<<A2/C<<endl;
	return 0;
}