A gift box is a cuboid, and its lateral expansion is a square with a side length of 16 cm. Find the volume of the gift box.
一个礼品盒是长方体，它的侧面展开是一个边长为16厘米的正方形，求礼品盒的体积．
<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">4 * 4 * 16</gadget>
<output>256</output>

<result>256</result>