Find the matrix product of two 2D arrays.

For example, given

import numpy as np A = np.array([ [9, 8], [7, 6], [5, 4], [3, 2], ]) B = np.array([ [1, 2, 3], [4, 5, 6] ])

Find

[[41 58 75] [31 44 57] [21 30 39] [11 16 21]]

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