def subgrid_rect_obj(lon_llc, lat_llc):
    """
    Create a polygon object for a single area rectangle that
    can be used with the area function

    Parameters:
        lon_llc (int) : lower left hand corner of the longitude
        lat_llc (int) : lower left hand corner of the latitude

    Returns:
        dictionary with 'type' and 'coordinates' keys

    Note:
    - assumes that we are working with a 4x5 (lat, lon) grid
    - I am following the counter-clockwise coordinate ordering of the example
    """
    # create coordinates
    lrc = [lon_llc + 5, lat_llc]
    urc = [lon_llc + 5, lat_llc + 4]
    ulc = [lon_llc, lat_llc + 4]

    # create the object
    return {
        'type': 'Polygon',
        'coordinates': [
            [[lon_llc, lat_llc], lrc, urc, ulc, [lon_llc, lat_llc]]
        ]
    }