'x.__rdiv__(y) <=> y/x
Only `NDArray` is supported for now.
Example usage:
>>> x = mx.nd.ones((2,3))*3
>>> y = mx.nd.ones((2,3))
>>> x.__rdiv__(y).asnumpy()
array([[ 0.33333334,  0.33333334,  0.33333334],
[ 0.33333334,  0.33333334,  0.33333334]], dtype=float32)'

def __rdiv__(self, other):

    if isinstance(other, Number):
        return _internal._RDivScalar(self, scalar=other)
    else:
        raise TypeError(('type    %s    not    supported' % str(type(other))))
