A story book has 180 pages, and after reading (2/9) of the total number of pages, what page should be read from when reading again.
一本故事书180页，读了总页数的(2/9)，再次读时应该从第多少页开始读．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">180 * (2/9)</gadget>
<output>40</output>

<gadget id="calculator">40 + 1</gadget>
<output>41</output>

<result>41</result>