import all_constants as c


def round_ans(val):
    """
    Round a number to the nearest whole value.
    :param val: Value to round
    :return: Rounded result as a string
    """
    return str(round(val))


def to_kilogram(to_convert):
    """
    Convert pounds to kilograms.
    """
    answer = to_convert * c.LB_TO_KG
    return round_ans(answer)


def to_pounds(to_convert):
    """
    Convert kilograms to pounds.
    """
    answer = to_convert * c.KG_TO_LB
    return round_ans(answer)