A rope is 168 meters long, 57 meters are used for the first time, and 43 meters are used for the second time, how many meters are left?
一根绳子长168米，第一次用去57米，第二次用去43米，还剩多少米？
<gadget id="calculator">168 - 57 - 43</gadget>
<output>68</output>

<result>68</result>