There are 240 literary books in the school library, science books are literary books (7/8), and story books are literary books (9/10). How many story books are there?
学校图书室有文艺书240本，科技书是文艺书的(7/8)，故事书是文艺书的(9/10)．故事书有多少本？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">240 * (9/10)</gadget>
<output>216</output>

<result>216</result>