A 2-meter-long rope, after cutting (1/2) of it, how much of it is left
一根2米长的绳子，截下它的(1/2)后，还剩下它的多少
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>