A box of apples, eat (2/5), eat 18, how many apples are in this box.
一箱苹果，吃了(2/5)，吃了18颗，这箱苹果原有多少颗．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">18 / (2/5)</gadget>
<output>45</output>

<result>45</result>