import java.util.Scanner;

public class Main {
	static long t = 0;

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (sc.hasNext()) {
			solve(sc.nextLine());
		}
		System.out.println(t);

		sc.close();
	}

	public static void solve(String input) {
		if (input.split(" ").length == 1) {
			input = null;
			return;
		}
		long s = Long.valueOf(input.split(" ")[0]);
		long k = Long.valueOf(input.split(" ")[1]);
		input = null;
		
		if (s % 2 == 0) {
			t += (s / 2) * k;
		} else {
			t += (s + 1) / 2 * k;
		}
		if(t > 1000000007){
			System.gc();
		}
		t = t % 1000000007;
	}
}