Fold a 2-meter-long rope in half and then in half, how long is each piece?
把2米长的绳子对折再对折，每段是多长？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

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