A story book, Xiao Ming read (1/3) of the whole book on the first day, read the rest (1/3) on the second day, and did not read the rest of the book.
一本故事书，小明第一天看了全书的(1/3)，第二天看了剩下的(1/3)，还剩下全书的多少没有看．
<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">(2/3) * (1/3)</gadget>
<output>2/9 = around 0.222222</output>

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

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