Use 26-meter-long bamboo strips to form a rectangular flower bed, the length and width of which are integer meters, what is the maximum area of the flower bed?
用26米长的竹条围成一个长方形花坛，长和宽都是整米数，围成花坛的面积最大是多少．
<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<result>42</result>