The base of a cuboid is a square with a perimeter of 12 cm and a height of 2.5 cm. What is the volume of the cuboid in cubic centimeters?
一个长方体的底面是周长12厘米的正方形，高2.5厘米，长方体的体积是多少立方厘米？
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 2.5</gadget>
<output>22.5</output>

<result>22.5</result>