A swimming pool is 25 meters long. Xiaoqiang swam 4 back and forth. How many meters did Xiaoqiang swim?
一个游泳池长25米，小强游了4个来回，小强游了多少米？
<gadget id="calculator">2 * 4 * 25</gadget>
<output>200</output>

<result>200</result>