A story book has 135 pages in total. On the first day, read from the first page, read (2/5) of the whole book, and continue reading on the second day, from the first page.
一本故事书共135页，第一天从第一页看起，看了全书的(2/5)，第二天接着看，从第多少页看起．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">135 * (2/5)</gadget>
<output>54</output>

<gadget id="calculator">54 + 1</gadget>
<output>55</output>

<result>55</result>