A cuboid, the base is a square with a perimeter of 8 cm, and the sides are a rectangle whose length is twice the width. What is the volume of this cuboid? (There are two cases)
一个长方体，底面是一个周长为8厘米的正方形，侧面展开是个长方形，且长是宽的2倍，这个长方体的体积是多少立方分米？(有两种情况)
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">2 * 2 * 2 * 2</gadget>
<output>16</output>

<result>16</result>