input: from typing import Tuple, List
  
  def compute_3_layer_ann_output(input_layer: List[float], hidden_layer: List[List[float]], output_layer: List[float]) -> float:
      """ Compute the output of a 3-layer artificial neural network given the input layer, hidden layer, and output layer.
      >>> compute_3_layer_ann_output([2, 3], [[0.1, 0.4], [0.8, 0.6], [0.3, 0.9]], [0.3, 0.7])
      2.13
      """
      import numpy as np
      hidden_layer_output = np.dot(input_layer, hidden_layer)
      output = np.dot(hidden_layer_output, output_layer)
      return output
output:     import numpy as np
      hidden_layer_output = np.dot(input_layer, hidden_layer)
      output = np.dot(hidden_layer_output, output_layer)
      return output