A wire is 20 meters long, 5 meters are used for the first time, and 6 meters are used for the second time, how many meters is the wire shorter?
一根铁丝长20米，第一次用去5米，第二次用去6米，这根铁丝短了多少米？
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<result>11</result>