A rectangular court is 80 meters long and 55 meters wide. Xiao Gang walked around the court twice, how many meters did he walk in total?
一个长方形球场，长80米，宽55米，小刚绕球场走了两圈，一共走了多少米．
<gadget id="calculator">80 + 55</gadget>
<output>135</output>

<gadget id="calculator">135 * 2 * 2</gadget>
<output>540</output>

<result>540</result>