Fill an uncovered iron box with a length of 8dm, width of 5dm, and height of 4dm with water, and then put two cuboid stones of length 3dm, width of 2dm, and height of 1.5dm. What is the total volume of water overflowing from the iron box?
在一个长8dm，宽5dm，高4dm的无盖铁箱中注满水，然后放入两块长3dm，宽2dm，高1.5dm的长方体石块，铁箱中溢出的水的体积共多少？
<gadget id="calculator">3 * 2 * 1.5 * 2</gadget>
<output>18</output>

<result>18</result>