input: Write a function to multiply two input numbers and print the result. The function should take two parameters, both of which are integers.
  def multiply(a, b):
      result = a * b
      print(result)
  
  multiply(3, 4)
  multiply(5, 6)
  multiply(7, 2)
  multiply(0, 8)
  multiply(-1, 10)
  
  assert multiply(3, 4) == None
  assert multiply(5, 6) == None
  assert multiply(7, 2) == None
  assert multiply(0, 8) == None
  assert multiply(-1, 10) == None
output: def multiply(a, b):
      result = a * b
      print(result)