A rectangular vegetable garden with a length of 11 meters and a width of 9 meters is fenced, and one side is wide against the wall. How long is this fence going to be?
给一块长11米，宽9米的长方形菜园子围栅栏，有一边宽靠墙．算一算这个栅栏要围多长？
<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<gadget id="calculator">22 + 9</gadget>
<output>31</output>

<result>31</result>