def test_multiplication_of_2_times_one_quarter(self):
first_number = 2
second_number = 0.25
calculator = Calculator("comum")
self.assertEqual(0.5, calculator.multiply(first_number, second_number))
def test_multiplication_of_0_times_5(self):
first_number = 0
second_number = 5
calculator = Calculator("comum")
self.assertEqual(0, calculator.multiply(first_number, second_number))