Grandpa Wang built a rectangular chicken farm with a fence against the wall. The chicken pen is 8 meters long and 3 meters wide. How many meters of fence do you need at least?
王爷爷靠墙用篱笆围起一个长方形的养鸡场，鸡圈长8米，宽3米，至少需要篱笆多少米？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">8 + 6</gadget>
<output>14</output>

<result>14</result>