The cuboid packaging box with a square bottom is 20cm high, and the sides are unfolded to form a square. What is the volume of the cuboid in cubic centimeters?
底面是正方形的长方体包装盒高20cm，侧面展开后是一个正方形，这个长方体的体积是多少立方厘米？
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 5 * 20</gadget>
<output>500</output>

<result>500</result>