Xiaohua swam 2 back and forth in the 50-meter swimming pool, how many meters did Xiaohua swim in total?
小华在50米长的游泳池里游了2个来回，小华一共游了多少米．
<gadget id="calculator">50 * 2 * 2</gadget>
<output>200</output>

<result>200</result>