def convert_cidr_to_netmask(netmask_cidr: str) -> str:
    """
    This function will convert a netmask CIDR in a standard netmask (255.0.0.0)
    :param netmask_cidr: IP address netmask in CIDR format (/24)
    :return str: IP address netmask in 255.255.255.255 format
    """
    bits = 0

    for i in range(32 - int(netmask_cidr), 32):
        bits |= (1 << i)
    return (
        "%d.%d.%d.%d" %
        (
            (bits & 0xff000000) >> 24,
            (bits & 0xff0000) >> 16,
            (bits & 0xff00) >> 8,
            (bits & 0xff)
        )
    )