A rope is 2 meters long, how many decimeters will it be after being folded twice?
一根绳子长2米，对折两次后长多少分米？
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<result>5</result>