import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n1 = sc.nextInt();
		long[] A = new long[n1];
		for (int i = 0; i < n1; ++i)
			A[i] = sc.nextLong();
		int n2 = sc.nextInt();
		long[] B = new long[n2];
		for (int i = 0; i < n2; ++i)
			B[i] = sc.nextLong();
		long den = 1;
		long num = 1;
		for (int i = n2 - 1; i >= 0; i -= 2) {
			if (n2 % 2 == 1) {
				den = den * B[i];
			} else {
				num = num * B[i];
			}
		}
		for (int i = n2 - 2; i >= 0; i -= 2) {
			if (n2 % 2 == 0) {
				den = den * B[i];
			} else {
				num = num * B[i];
			}
		}
		for (int i = 1; i < n1; ++i) {
			den = den * A[i];
		}
		num *= A[0];
		long g = gcd(Math.abs(den), Math.abs(num));
		den /= g;
		num /= g;
		System.out.println((int) (Math.signum(num) * Math.signum(den)) * Math.abs(num) + " " + Math.abs(den));
	}

	static long gcd(long a, long b) {
		if (a > b)
			return gcd(b, a);
		if (a == 0)
			return b;
		return gcd(b % a, a);
	}

	public static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}