import java.util.Scanner;

class Main
{
	public static long gcd(long x, long y)
	{
		long r;
		x = Math.abs(x);
		y = Math.abs(y);
		if (y > x) {
			r = x;
			x = y;
			y = r;
		}
		while (y > 0) {
			r = x % y;
			x = y;
			y = r;
		}
		return x;
	}
	
	public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		long n1, n2, a, b, numerator = 0, denominator = 1, i;
		n1 = sc.nextInt();
		for (i = 0; i < n1; i++) {
			a = sc.nextInt();
			if (1 > i) numerator = a;
			else denominator *= a;
		}
		n2 = sc.nextInt();
		for (i = 0; i < n2; i++) {
			b = sc.nextInt();
			if (i % 2 == 1) numerator *= b;
			else denominator *= b;
		}
		sc.close();
		if (0 > denominator) {
			numerator = -numerator;
			denominator = -denominator;
		}
		System.out.print(numerator / gcd(numerator, denominator) + " " + denominator / gcd(numerator, denominator));
	}
}