If the chocolate is (7/4) of Beijing halva, then the Beijing halva is of chocolate ((())/(())).
如果巧克力是北京酥糖的(7/4)，那么北京酥糖是巧克力的((())/(()))．
<gadget id="calculator">7 / 4</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">1 / (7/4)</gadget>
<output>4/7 = around 0.571429</output>

<result>4/7 = around 0.571429</result>