(multiply
  (array 2 2 '(1 2   3 4))
  (array 2 3 '(-3 -8 3   -2 1 4)))

((-7 -6 11)
 (-17 -20 25))

(multiply
  (array 3 2 '(1 2   3 4   3 6))
  (array 2 3 '(-3 -8 3   -2 1 4)))

((-7 -6 11)
 (-17 -20 25)
 (-21 -18 33))


(multiply
  (array 3 3 '(1 2 3   4 5 6   7 8 9))
  (array 3 3 '(2 2 2   5 5 5   7 7 7)))

((33 33 33)
 (75 75 75)
 (117 117 117))


(multiply
  (array 4 2 '(1 2 3 4 5 6 7 8))
  (array 2 3 '(1 2 3 4 5 6)))

((9 12 15)
 (19 26 33)
 (29 40 51)
 (39 54 69))