There are 45 books in the book corner. Among them (2/5) are storybooks, how many storybooks are there?
图书角有45本书．其中(2/5)是故事书，故事书有多少本？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">45 * (2/5)</gadget>
<output>18</output>

<result>18</result>