A rectangular lawn is 54.6 meters long and 35.4 meters wide. Xiaohong walked three times around the lawn. How many meters did Xiaohong walk in total?
一块长方形草坪长54.6米，宽35.4米，小红沿着草坪的四周走了3圈，小红一共走了多少米？
<gadget id="calculator">54.6 + 35.4</gadget>
<output>90</output>

<gadget id="calculator">90 * 2 * 3</gadget>
<output>540</output>

<result>540</result>