How many different rectangles can be formed by using a 24 cm long iron wire to enclose a rectangle whose length and width are whole centimeters?
用一根长24厘米的铁丝，围成长和宽都是整厘米数的长方形，可围成多少种不同的长方形．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>