public void Method_multiply_returns_multiplication_of_given_doubles()
        {
            //arrange
            var math = new Mathematics();

            //act
            double result = math.Multiply(6.1, 10.1);

            //assert
            Assert.Equal(61.61, result, 2);
        }
        public void Method_multiply_returns_multiplication_of_given_integers()
        {
            //arrange
            var math = new Mathematics();

            //act
            double result = math.Multiply(10, 20);

            //assert
            Assert.Equal(200, result);
        }