There are 45 books in the book corner, among which (1/5) are story books, how many are there?
图书角有45本图书，其中(1/5)是故事书，故事书有多少本．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">45 * (1/5)</gadget>
<output>9</output>

<result>9</result>