A piece of rectangular paper, the length is 8 decimeters, the width is 5 decimeters, cut off the largest square, what is the perimeter of the remaining small rectangle?
一张长方形纸，长是8分米，宽是5分米，剪去一个最大的正方形，剩下的小长方形的周长是多少分米．
<gadget id="calculator">8 - 5</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>