A bamboo pole is several meters long. If you measure it with a rope, it will be 1.8 meters longer. If you fold the rope in half and then measure it, it will be 1.2 meters less. How long is the rope?
一根竹竿长若干米，用一根绳子来量多1.8米，如果将绳子对折后再来量，又少1.2米，这根绳子长多少米？
<gadget id="calculator">1.2 + 1.8</gadget>
<output>3</output>

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

<result>6</result>