A cuboid whose base is a square, and its lateral expansion is a square with a perimeter of 72 cm, what is the volume of the cuboid?
一个底面是正方形的长方体，它的侧面展开是一个周长为72厘米的正方形，求长方体的体积？
<gadget id="calculator">72 / 4 / 4</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">72 / 4</gadget>
<output>18</output>

<gadget id="calculator">(9/2) * (9/2) * 18</gadget>
<output>729/2 = around 364.5</output>

<result>729/2 = around 364.5</result>