The surface area of a desk is 0.72m**2 and its width is 0.8m. What is its circumference in meters?
一张课桌桌面的面积是0.72m**2，宽是0.8m，它的周长是多少米？
<gadget id="calculator">0.72 / 0.8</gadget>
<output>0.9</output>

<gadget id="calculator">0.9 + 0.8</gadget>
<output>1.7</output>

<gadget id="calculator">1.7 * 2</gadget>
<output>3.4</output>

<result>3.4</result>