Read a 180-page book, read the whole book (1/9) every day, how many pages have you read in 3 days?
看一本180页的书，每天看全书的(1/9)，3天看了多少页．
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/9) * 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">120 * (1/3)</gadget>
<output>40</output>

<result>40</result>