The lane of a swimming pool is 68 meters long. Mr. Wang swam 3 times, how many meters did he swim in total?
一个游泳池的泳道长68米，王老师游了3个来回，一共游了多少米？
<gadget id="calculator">3 * 2 * 68</gadget>
<output>408</output>

<result>408</result>