Xiao Ming went swimming on weekends and swam 3 round trips, a total of 300 meters. What is the length of this swimming pool?
小明周末游泳，游了3个来回，共游300米，这个游泳池的长是多少米？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">300 / 6</gadget>
<output>50</output>

<result>50</result>