For a novel, Xiao Ming read (1/3) of the whole book on the first day, and the rest (1/3) on the second day, and did not read the rest of the book.
一本小说，小明第一天看了全书的(1/3)，第二天看了剩下的(1/3)，还剩全书的多少没有看．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 * (2/3) * (2/3)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>