The wall of Uncle Li's house is 10 meters long. He wants to use a fence to surround a rectangular chicken coop with a length of 6 meters and a width of 4 meters. What is the minimum length of the fence that should be prepared?
李伯伯家的墙长10米，他想用篱笆靠墙围一个长6米，宽4米的长方形鸡圈，最少应准备多少米长的篱笆．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

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

<result>14</result>