Xiaoqiang participated in the swimming summer camp. From July 28 to August 5, he swam 6 times a day along the 50-meter-long swimming lane. How many meters did Xiaoqiang swim during the whole activity?
小强参加游泳夏令营活动，从7月28日到8月5日，每天沿着50米长的泳道游6个来回，那么小强在整个活动期间共游了多少米．
<gadget id="calculator">2 * 6 * 50 * 9</gadget>
<output>5_400</output>

<result>5_400</result>