A bottle of fruit juice, drank (3/4), there is still ((())/(())) in the glass.
一瓶果汁，喝了(3/4)，杯中还有((())/(()))．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>