The length of the football field is 120 meters, and the width is 90 meters. Xiaohua ran around the football field. How many meters did he run in total?
足球场的长120米，宽90米，小华沿着足球场跑一圈，一共跑了多少米？
<gadget id="calculator">120 + 90</gadget>
<output>210</output>

<gadget id="calculator">210 * 2</gadget>
<output>420</output>

<result>420</result>