Read a book, read the whole book every day (2/9), how much of the whole book in 4 days.
看一本书，每天看全书的(2/9)，4天看了全书的多少．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) * 4</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>