box of apples, eat (1/3), eat 18, the original number of apples in this box.
一箱苹果，吃了(1/3)，吃了18颗，这箱苹果原有多少颗．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18 / (1/3)</gadget>
<output>54</output>

<result>54</result>