The library has newly purchased a batch of books. The science books (2/5) are literature and art books, and the story books are literature and art books (4/3). There are 240 science and technology books. How many story books are there?
图书馆新购进一批图书，科技书的(2/5)是文艺书，故事书是文艺书的(4/3)，科技书240本，故事书有多少本？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">240 * (2/5) * (4/3)</gadget>
<output>128</output>

<result>128</result>