Pour water into a cuboid tank with a length of 5 decimeters, a width of 3 decimeters, and a height of 2 decimeters. A stone is completely submerged in the water. After the stone is taken out, the water level drops by 12 centimeters. The volume of the stone is How many cubic decimeters?
在一个长5分米，宽3分米，高2分米的长方体水槽中倒入水，把一块石块放入水中完全浸没，拿出石块后水面下降了12厘米，石块的体积是多少立方分米？
<gadget id="calculator">12 / 10</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">5 * 3 * (6/5)</gadget>
<output>18</output>

<result>18</result>