There is a rectangular lawn with a length of 24 meters and a width of 16 meters. Wang Hua walked along this lawn twice. How many meters did he walk?
有一块长方形草坪，长是24米，宽是16米，王华沿着这个草坪走了2圈，他走了多少米？
<gadget id="calculator">24 + 16</gadget>
<output>40</output>

<gadget id="calculator">40 * 2 * 2</gadget>
<output>160</output>

<result>160</result>