The (3/10) of A's number is 60, what is its (2/5)?
甲数的(3/10)是60，它的(2/5)是多少．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">60 / (3/10)</gadget>
<output>200</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">200 * (2/5)</gadget>
<output>80</output>

<result>80</result>