Uncle Zhang used a fence to form a rectangular sheepfold, with one side against the wall. The sheepfold was 5 meters long and 3 meters wide. How many meters should the fence be at least?
张大伯用篱笆围成一个长方形羊圈，一面靠墙，羊圈长5米，宽3米，篱笆至少长多少米？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<result>11</result>