A 6-meter-long rope, cut off (1/2), how many meters are left
一根6米长的绳子，截下(1/2)，还剩多少米
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6 * (1/2)</gadget>
<output>3</output>

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<result>3</result>