Xiaohong went to swim in the swimming pool. He swam 4 back and forth in the lane, and swam a total of 200 meters. How long is the lane in this swimming pool?
小红去游泳池游泳，他在游道内游了4个来回，共游了200米，这个游泳池的泳道有多长？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">200 / 8</gadget>
<output>25</output>

<result>25</result>