12-meter-long rope is cut off by 3.9 meters for the first time and 2.2 meters for the second time. How much shorter is the rope now than it was before?
一根长12米的绳子，第一次剪去3.9米，第二次剪去2.2米．现在这根绳子比原来短了多少米？
<gadget id="calculator">3.9 + 2.2</gadget>
<output>6.1</output>

<result>6.1</result>