There are 84 books in the three (one) book corner, and story books account for (2/3). How many story books are there?
三(一)图书角有84本书，故事书占(2/3)，故事书多少本？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">84 * (2/3)</gadget>
<output>56</output>

<result>56</result>