A rectangular flower bed is 6 meters long and 3 times its width, what is the perimeter of the flower bed in meters?
一个长方形花坛长6米，是宽的3倍，这个花坛的周长是多少米．
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 + 6</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>