cuboid water tank is 20 cm long, 15 cm wide, and 6 cm deep. A stone is thrown into the water (the stone is completely submerged in the water) and the water surface rises to 8 cm. What is the volume of the stone in cm?
一个长方体水缸，长20厘米，宽15厘米，水深6厘米，将一块石头投入水中(石头完全浸入水)水面上升到8厘米，这块石头的体积是多少厘米．
<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<gadget id="calculator">20 * 15 * 2</gadget>
<output>600</output>

<result>600</result>