The wall of Grandma Wang's house is 13 meters long. She wants to use a fence to surround a rectangular vegetable garden with a length of 5 meters and a width of 3 meters. At least how many meters of fence should be prepared.
王奶奶家的墙长13米，她想用篱笆靠墙围一个长5米，宽3米的长方形菜园，至少应准备多少米长的篱笆．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<result>11</result>