A cuboid container filled with water measures 25 cm in length, 20 cm in width, 18 cm in height, and 9 cm in water depth. If a stone is submerged in water, the water depth becomes 12 cm. What is the volume of the stone in cubic centimeters? ．
一个盛有水的长方体容器，从里面量长25厘米，宽20厘米，高18厘米，水深9厘米，把一个石块浸没在水中后，水深变为12厘米，石块的体积是多少立方厘米．
<gadget id="calculator">12 - 9</gadget>
<output>3</output>

<gadget id="calculator">25 * 20 * 3</gadget>
<output>1_500</output>

<result>1_500</result>