A cuboid container measures 2dm in length and 1.5dm in width from the inside. After putting an iron ball into it, the iron ball is completely submerged in the water. At this time, the water level rises by 0.25dm and the water does not overflow. What is the volume of the iron ball? cubic decimeter?
一个长方体容器，从里面量长为2dm，宽为1.5dm，放入一个铁球后，铁球完全浸没在水中，这时水面上升了0.25dm，且水未溢出，这个铁球的体积是多少立方分米？
<gadget id="calculator">2 * 1.5 * 0.25</gadget>
<output>0.75</output>

<result>0.75</result>