Xiao Ming swam 2 times in the swimming pool today. The length of the swimming pool is 200 meters. How many meters did he swim in total?
小明今天在游泳池游了2个来回，泳池长200米，一共游了多少米？
<gadget id="calculator">200 * 4</gadget>
<output>800</output>

<result>800</result>