The school bought a batch of new books, including 30 storybooks and 18 technology trees, accounting for (3/5) of this batch of new books. How many new books are there in this batch?
学校买了一批新书，其中故事书有30本，科技树有18本，共占这批新书的(3/5)．这批新书有多少本？
<gadget id="calculator">30 + 18</gadget>
<output>48</output>

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

<gadget id="calculator">48 / (3/5)</gadget>
<output>80</output>

<result>80</result>