One side is against the wall, and the other three sides are surrounded by fences to form a rectangle with a length of 10 meters and a width of 6 meters. What is the minimum number of meters of fence required?
一面靠墙、其余三面用篱笆围成一个长10米、宽6米的长方形，最少需要篱笆多少米．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

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

<result>22</result>