input: Write a function to create a Python program that multiplies two input numbers and prints the result.
  
  def multiply(a, b):
      result = a * b
      print(result)
  
  assert multiply(3, 4) == None
  assert multiply(5, 2) == None
  assert multiply(7, 8) == None
  assert multiply(0, 9) == None
  assert multiply(-1, 6) == None
output: def multiply(a, b):
      result = a * b
      print(result)