A 16-meter-long rope is folded in half and then folded in half again. What is the length of each piece?
一根16米长的绳子，对折后又对折，每段长是多少
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<result>4</result>