A cuboid water tank is 40 cm long, 20 cm wide, and 12 cm deep. After a stone is completely submerged in the water, the water level rises by 4 cm (the water does not overflow), what is the volume of the stone in cubic centimeters?
一个长方体水缸，长40厘米，宽20厘米，水深12厘米，将一块石头完全浸入水中后，水面上升4厘米(水没有溢出)，这块石头的体积是多少立方厘米．
<gadget id="calculator">40 * 20 * 4</gadget>
<output>3_200</output>

<result>3_200</result>