input: from typing import List
  
  def multiply_numbers(numbers: List[int]) -> int:
      """ Multiplies two input numbers and returns the result.
      >>> multiply_numbers([3, 4])
      12
      >>> multiply_numbers([5, 6])
      30
      """
      a, b = numbers
      return a * b
output:     if len(numbers) != 2:
          raise ValueError("The input list must contain exactly two numbers.")