A cube container with a side length of 3dm, the water level rises by 0.4dm after a stone is put in, what is the volume of the stone?
一个正方体容器，棱长为3dm，放入一块石头后水面升高了0.4dm，这块石头的体积是多少？
<gadget id="calculator">3 * 3 * 0.4</gadget>
<output>3.6</output>

<result>3.6</result>