new batch of books has been added to the library, among which story books account for 3/20 of the total, technology books account for 3/5 of story books, and literature and art books account for 2/9 of the total. What percentage of the total number of literature and art books?
图书室新进一批图书，其中故事书的本数占总数的(3/20)，科技书的本数是故事书的(3/5)，文艺书的本数是科技书的(2/9)．文艺书的本数占总数的几分之几？
<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(3/20) * (3/5) * (2/9)</gadget>
<output>1/50 = around 0.02</output>

<result>1/50 = around 0.02</result>