>>> from conv_mp21 import conv_mp21

>>> c = conv_mp21(7.0, 3.0, 2)
>>> c == 4.0
True

>>> c = conv_mp21(7.0, 3.0, 6)
>>> c == 4.0
True

>>> c = conv_mp21(1.5, -0.5, 4)
>>> c == 0.0
True

>>> c = conv_mp21(1.0, -1.0, 4)
>>> c == -0.5
True