In a cuboid container, the bottom surface is 5 decimeters long, 4 decimeters wide, and the water is 4 decimeters high. A crystal stone is placed in it, and the water surface rises to 5.4 decimeters. What is the volume of this crystal stone decimeters**3?
一个长方体容器，底面长5分米，宽4分米，水高4分米，放入一块水晶石，水面升到5.4分米，这块水晶石的体积是多少分米**3？
<gadget id="calculator">5.4 - 4</gadget>
<output>1.4</output>

<gadget id="calculator">5 * 4 * 1.4</gadget>
<output>28</output>

<result>28</result>