The perimeter of the base of a cube is 12 cm, what is its volume in cm**3.
一个正方体的底面周长是12cm，它的体积是多少cm**3．
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<result>27</result>