A rectangular piece of fabric is 5 meters long and its width is 2 meters shorter than its length. What is the perimeter of the piece of fabric in meters?
一块长方形布料长5米，宽比长短2米，这块布料的周长是多少米？
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

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

<result>16</result>