rectangular swimming pool is 40 meters long. Xiao Ming swims 5 times along the long side of the rectangle. How many meters did Xiao Ming swim?
一个长方形游泳池长40米，小明沿着长方形的长边游了5个来回，小明游了多少米？
<gadget id="calculator">2 * 5 * 40</gadget>
<output>400</output>

<result>400</result>