#include <stdio.h>
#include <stdlib.h>

long gcd(long x, long y)
{
	long r;
	x = labs(x);
	y = labs(y);
	if (y > x) {
		r = x;
		x = y;
		y = r;
	}
	while (y > 0) {
		r = x % y;
		x = y;
		y = r;
	}
	return x;
}

int main(void)
{
	long n1, n2, a, b, numerator, denominator = 1, i;
	scanf("%ld", &n1);
	for (i = 0; i < n1; i++) {
		scanf("%ld", &a);
		if (1 > i) numerator = a;
		else denominator *= a;
	}
	scanf("%ld", &n2);
	for (i = 0; i < n2; i++) {
		scanf("%ld", &b);
		if (i % 2) numerator *= b;
		else denominator *= b;
	}
	if (0 > denominator) {
		numerator = -numerator;
		denominator = -denominator;
	}
	printf("%ld %ld", numerator / gcd(numerator, denominator), denominator / gcd(numerator, denominator));
	return 0;
}