The length of a rectangular flower bed is 8 meters, and the width is 1 meter. Congcong walked around the flower bed, how many meters did he walk in total?
一个长方形花坛的长是8米，宽是1米，聪聪绕着这个花坛走了一圈，一共走了多少米？
<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>