A cube glass container with an edge length of 2dm, pour 5L of water into the container, and then put a stone into the water, the stone is completely submerged in the water. At this time, the water depth in the container is measured to be 1.5dm. What is the volume of the stone? (thickness of glass is ignored)
一个正方体玻璃容器的棱长为2dm，向容器中注入5L水，再把一块石头放入水中，石头被水完全浸没．这时量得容器内水深1.5dm．石头的体积是多少？(玻璃的厚度忽略不计)
<gadget id="calculator">2 * 2 * 1.5</gadget>
<output>6</output>

<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<result>1</result>