Read a 240-page story book, read 40% of it on the first day, and read (1/3) of it on the second day. How many more pages do I need to read the next day to see as much as the first day?
看一本240页的故事书，第一天看了它的40%，第二天又看了它的(1/3)．第二天再多看多少页才和第一天看得一样多？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">240 * (2/5)</gadget>
<output>96</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">240 * (1/3)</gadget>
<output>80</output>

<gadget id="calculator">96 - 80</gadget>
<output>16</output>

<result>16</result>