Use two identical rectangles to form a new rectangle. The length of the original rectangle is 4 meters and the width is 2 meters. What is the perimeter of the new rectangle?
用两个同样的长方形，拼成一个新的长方形，原长方形长4米，宽2米，拼成的新长方形周长是多少米？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 4</gadget>
<output>8</output>

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

<result>16</result>