There is a cuboid glass jar with a length of 5dm, a width of 4dm, and a height of 3dm. Put a cube iron block into the jar, and then fill it with water. At this time, the water has submerged the cube iron block. did not overflow), the water level dropped by 0.2dm, what is the volume of this iron block?
有一个长为5dm，宽为4dm，高为3dm的长方体玻璃缸，向缸中放入一个正方体铁块，然后注满水，此时水已浸没正方体铁块，当取出这个铁块后(水未溢出)，水面下降了0.2dm，这个铁块的体积是多少？
<gadget id="calculator">5 * 4 * 0.2</gadget>
<output>4</output>

<result>4</result>