There are 200 science and technology books in the school library. The story books are science and technology books (9/10), and literature and art books (2/3). How many literature and art books are there?
学校图书室有科技书200本，故事书是科技书的(9/10)，是文艺书的(2/3)，文艺书有多少本？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(9/10) / (2/3)</gadget>
<output>27/20 = around 1.35</output>

<gadget id="calculator">200 * (27/20)</gadget>
<output>270</output>

<result>270</result>