Naive Python to C with Cython

multiplication.pyx

import numpy as np

def cython_multiplication(a,b):
    product = np.ones(a.shape)

    for row_index in np.arange(a.shape[0]):
        for col_index in np.arange(a.shape[1]):
            product[row_index][col_index] = a[row_index][col_index] * b[row_index][col_index]

    return product