There are three kinds of books on the bookshelf. There are 30 technical books, accounting for 20% of the total. The ratio of story books to literary books is 3:2. How many literary books are there?
书架上有三种书，科技书有30本，占总数的20%，故事书和文艺书的本数比是3：2，文艺书有多少本？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 / (1/5)</gadget>
<output>150</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">(4/5) / 5</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">150 * (4/25) * 2</gadget>
<output>48</output>

<result>48</result>