A rope is 20 meters long, 7.6 meters are used for the first time, and 5.7 meters are used for the second time, how many meters are shared between the two times?
一根绳子长20米，第一次用去7.6米，第二次用去5.7米，两次共用去多少米？
<gadget id="calculator">7.6 + 5.7</gadget>
<output>13.3</output>

<result>13.3</result>