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  1. def prodMatrix(matrizA, matrizB):
  2.   """Multiplica duas matrizes."""
  3.   sizeLA = len(matrizA)
  4.   sizeCA = len(matrizA[0]) # deve ser igual a sizeLB para ser possível multiplicar as matrizes
  5.   sizeCB = len(matrizB[0])
  6.   matrizR = []
  7.   # Multiplica
  8.   for i in range(sizeLA):
  9.       matrizR.append([])
  10.       for j in range(sizeCB):
  11.           val = 0
  12.           for k in range(sizeCA):
  13.                   val += matrizA[i][k]*matrizB[k][j]
  14.           matrizR[i].append(val)
  15.   return matrizR
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