Ding Li walked around the playground which is 140 meters long and 100 meters wide. How many meters did he walk?
丁力绕着长是140米，宽是100米的操场走了一圈，他走了多少米？
<gadget id="calculator">140 + 100</gadget>
<output>240</output>

<gadget id="calculator">240 * 2</gadget>
<output>480</output>

<result>480</result>