The width of the rectangle is 2 decimeters, and the length is 3 times the width. What is the perimeter of the rectangle?
长方形的宽是2分米，长是宽的3倍，这个长方形的周长是多少米？
<gadget id="calculator">6 + 2</gadget>
<output>8</output>

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

<gadget id="calculator">16 / 10</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>