What is the volume of a cube with a base perimeter of 8 cm?
一个底面周长为8厘米的正方体，它的体积是多少立方厘米．
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

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

<result>8</result>