Xiao Ming swam 2 back and forth in the swimming pool today. The length of the swimming pool is 50 meters. How many meters did Xiao Ming swim in total?
小明今天在游泳池游了2个来回，泳池长50米，小明一共游了多少米？
<gadget id="calculator">50 * 2 * 2</gadget>
<output>200</output>

<result>200</result>