A rectangular vegetable field is 6 meters long and 5 meters wide, surrounded by fences, one of which is against the wall, and the fence is at least how many meters long.
一块长方形菜地，长6米，宽5米，四周围上篱笆，其中有一面靠墙，篱笆至少长多少米．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 6</gadget>
<output>16</output>

<result>16</result>