Aunt Zhang wants to surround a rectangular open space with a length of 40 meters and a width of 26 meters with a fence against the wall. How many meters of fence is needed at least?
张阿姨要靠墙用篱笆围一个长40米，宽26米的长方形空地，至少需要多少米的篱笆．
<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<gadget id="calculator">40 + 52</gadget>
<output>92</output>

<result>92</result>