input: from typing import List
  
  
  def multiply_two_numbers(numbers: List[float]) -> float:
      """
      Multiplies two input numbers and returns the result.
      >>> multiply_two_numbers([3, 4])
      12
      >>> multiply_two_numbers([5, 5])
      25
      """
output:     if len(numbers) != 2:
          raise ValueError("The list must contain exactly two numbers.")
      return numbers[0] * numbers[1]