Xiao Min reads a 60-page story book and has already read (2/5) of the whole book. How many pages are left?
小敏看一本60页的故事书，已经看了整本书的(2/5)，还剩多少页没有看完？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 * (2/5)</gadget>
<output>24</output>

<gadget id="calculator">60 - 24</gadget>
<output>36</output>

<result>36</result>