def METHOD_NAME(self):
    lats, lons = self._as_bounded_coords(
        [[-80, -70], [0, 10], [70, 80]], [[0, 10], [10, 30]]
    )
    area = _quadrant_area(lats, lons, DEFAULT_SPHERICAL_EARTH_RADIUS)
    self.assertArrayAllClose(
        area,
        [
            [3.19251846e11, 6.38503692e11],
            [1.22880059e12, 2.45760119e12],
            [3.19251846e11, 6.38503692e11],
        ],
    )