code: def test_multiplication_operator(self):
      statement = Statement(text="What is 100 * 20")
      response = self.adapter.process(statement)
      self.assertEqual(response.text, "100 * 20 = 2000")
      self.assertEqual(response.confidence, 1)
  
imports: from tests.base_case import ChatBotTestCase
  from chatterbot.logic import MathematicalEvaluation
  from chatterbot.conversation import Statement
label_desc: Use image node_id 6 for calling the MathematicalEvaluationTests obj's underlying member method code with example usage: obj.test_multiplication_operator() without return types