There is a cuboid container, measured from the inside, is 40 cm long, 25 cm wide, and 20 cm high. There is 12 centimeters of water in it, and the water level rises to 18 centimeters after submerging an iron block in the container. What is the volume of this iron block in cubic decimeters?
有一个长方体容器，从内部测量长40厘米，宽25厘米，高20厘米．里面注有12厘米深的水，在容器中浸没一个铁块后水面上升到了18厘米．这个铁块的体积是多少立方分米？
<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<gadget id="calculator">40 * 25 * 6</gadget>
<output>6_000</output>

<result>6_000</result>