def main() -> None:
    A, B = map(int, input().split())

    if A % 2 == B % 2:
        print(((2 * A + 1) * (2 * B + 1) + 1) // 2 % (10**9 + 7))
    else:
        print(((2 * A + 1) * (2 * B + 1) - 1) // 2 % (10**9 + 7))


if __name__ == '__main__': 
    main()