If a rope 8 decimeters long is folded in half and then folded in half again, what is the length of each piece of rope in centimeters?
一根8分米长的绳子，对折再对折后，每段绳子长多少厘米．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<result>20</result>