A story book has a total of 135 pages. Read the whole book (2/5) on the first day, read the whole book (4/9) on the second day, and continue reading on the third day, starting from the first page.
一本故事书共135页，第一天看了全书的(2/5)，第二天看了全书的(4/9)，第三天接着看，就从第多少页看起．
<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">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">135 * (4/9)</gadget>
<output>60</output>

<gadget id="calculator">54 + 60 + 1</gadget>
<output>115</output>

<result>115</result>