def check_unit(number):
    """
    The function that check the number and return the unit

    Parameter:
    number (float) : the answer from calculation

    Return:
    The unit of the answer

    """
    # check if the values is greater than one.
    if(number > 1):
        # return the unit with "s"
        return "square meters"
    else:
        # otherwise return unit without "s"
        return "square meter"