A cuboid glass tank is 40 cm long and 20 cm wide when measured from the inside, and the height of the water inside is 10 cm. When a stone is placed in the water, the height of the water rises by 3 cm. What is the volume of this stone in cubic centimeters?
一个长方体玻璃缸，从里面量长40厘米，宽20厘米，里面水的高度是10厘米．把一块石头放入水中，水面的高度上升了3厘米．这块石头的体积是多少立方厘米．
<gadget id="calculator">40 * 20 * 3</gadget>
<output>2_400</output>

<result>2_400</result>