Uncle Wang surrounded a rectangular chicken farm with a wall. The length and width were 14 meters and 8 meters respectively.
王大伯一面靠墙围了一个长方形养鸡场，长和宽分别是14米和8米，如果用篱笆围，至少要多少米米篱笆．
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">16 + 14</gadget>
<output>30</output>

<result>30</result>