There is a rectangle with an area of 540 square meters and a width of 9 meters. What is the perimeter in meters?
有一个长方形，面积是540平方米，它的宽是9米，周长是多少米？
<gadget id="calculator">540 / 9</gadget>
<output>60</output>

<gadget id="calculator">60 + 9</gadget>
<output>69</output>

<gadget id="calculator">69 * 2</gadget>
<output>138</output>

<result>138</result>