A story book, Xiaohong reads 40 pages every day, and reads (2/3) of this book in 4 days. How many pages does this story book have?
一本故事书，小红每天看40页，4天看了这本书的(2/3)，这本故事书共多少页？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">40 / (2/3)</gadget>
<output>60</output>

<gadget id="calculator">4 * 60</gadget>
<output>240</output>

<result>240</result>