A rectangular playground is 200 meters long and 160 meters wide. Xiao Ming ran around the playground. How many meters did he run?
一个长方形操场长是200米，宽160米，小明绕操场跑了一圈，他跑了多少米？
<gadget id="calculator">200 + 160</gadget>
<output>360</output>

<gadget id="calculator">360 * 2</gadget>
<output>720</output>

<result>720</result>