A rectangular garden, 8 meters long and 6 meters wide. One long side of it is against the wall, and the other three sides are surrounded by fences. How many meters should the fence be at least?
一块长方形花园，长8米，宽6米．它的一条长边靠墙，其余3边围上篱笆，篱笆至少要多少米？
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">8 + 12</gadget>
<output>20</output>

<result>20</result>