'Perform a more complicated test'

def test_complicated_operation(self):

    from .. import imperial
    distance = u.Quantity(15.0, u.meter)
    time = u.Quantity(11.0, u.second)
    velocity = (distance / time).to((imperial.mile / u.hour))
    assert_array_almost_equal(velocity.value, 3.05037, decimal=5)
    G = u.Quantity(6.673e-11, (((u.m ** 3) / u.kg) / (u.s ** 2)))
    new_q = (1.0 / ((4.0 * np.pi) * G)).to((((u.pc ** (-3)) / (u.s ** (-2))) * u.kg))
    side1 = u.Quantity(11.0, u.centimeter)
    side2 = u.Quantity(7.0, u.centimeter)
    area = (side1 * side2)
    assert_array_almost_equal(area.value, 77.0, decimal=15)
    assert (area.unit == (u.cm * u.cm))
