The library bought back a batch of story books, popular science books and comic books, among which the number of story books accounted for (3/5) of the total number of books in this batch, the number of popular science books was less than the number of comic books (1/5), and the number of comic books was less than that of story books 170 books, how many books are there in this batch of books?
图书馆买回一批故事书、科普书和连环画，其中故事书的本数占这批书总本数的(3/5)，科普书本数比连环画本数少(1/5)，连环画比故事书少170本，买回的这批书有多少本．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(2/5) * (5/9)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(3/5) - (2/9)</gadget>
<output>17/45 = around 0.377778</output>

<gadget id="calculator">170 / (17/45)</gadget>
<output>450</output>

<result>450</result>