A rectangular flower bed is 26 meters long and 18 meters wide, what is its perimeter in meters?
一块长方形花坛，长26米，宽18米，它的周长是多少米．
<gadget id="calculator">26 + 18</gadget>
<output>44</output>

<gadget id="calculator">44 * 2</gadget>
<output>88</output>

<result>88</result>