A rectangular piece of land is 20 meters long and 14 meters wide, what is the perimeter of the piece of land in meters?
一块长方形地长20米，宽14米，这块地的周长是多少米．
<gadget id="calculator">20 + 14</gadget>
<output>34</output>

<gadget id="calculator">34 * 2</gadget>
<output>68</output>

<result>68</result>