If a stone with a volume of 8.1dm**3 is placed in a tank with a side length of 3dm, how much will the water level rise in dm?
体积为8.1dm**3的石块放进棱长3dm的水槽里，水面会上升多少dm
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">8.1 / 9</gadget>
<output>0.9</output>

<result>0.9</result>