There are 2 different story books on the first floor of the bookshelf, 3 different science books on the second floor, and 4 different fairy tale books on the third floor. How many different ways are there to take a book from the first, second and third shelves of the bookshelf?
书架的第一层有2本不同的故事书，第二层有3本不同的科技书，第三层有4本不同的童话书．从书架上的第一、二、三层各取一本书，有多少种不同的取法？
<gadget id="calculator">2 * 3 * 4</gadget>
<output>24</output>

<result>24</result>