Pour 13.5 liters of water into a cube container with a side length of 3 decimeters, and put an irregular stone into the container. At this time, the water depth is 1.7 decimeters. What is the volume of this stone?
一个棱长3分米的正方体容器中倒入13.5升水，把一个不规则的石头放入容器中，这时水深1.7分米，这块石头的体积是多少？
<gadget id="calculator">3 * 3 * 1.7</gadget>
<output>15.3</output>

<gadget id="calculator">15.3 - 13.5</gadget>
<output>1.8</output>

<result>1.8</result>