Aunt Wang wants to surround a chicken farm with a length of 10 meters and a width of 6 meters by the wall of her house. How many meters should the fence be at least?
王大妈在自家的墙边想围一个长10米，宽6米的养鸡场，至少要篱笆多少米？
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 10</gadget>
<output>22</output>

<result>22</result>