A cuboid glass container, measured from the inside, is 3dm in length and width. Pour 5L of water into the container, and then put a stone into the water. At this time, the water depth in the container is measured to be 0.6dm. What is the volume of this stone?
一个长方体玻璃容器，从里面量长、宽均为3dm，向容器内中倒入5L水，再把一块石头放入水中，这时量得容器内的水深是0.6dm．这块石头的体积是多少？
<gadget id="calculator">3 * 3 * 0.6</gadget>
<output>5.4</output>

<gadget id="calculator">5.4 - 5</gadget>
<output>0.4</output>

<result>0.4</result>