In the science class, each group has a cuboid water tank. The length measured from the inside is 20 cm, the width is 15 cm, the height is 10 cm, and the water depth inside is 6 cm. Xiaodong puts a small stone into the water tank (the small stone is completely submerged in the water) , the water level has risen by 2 cm, what is the volume of this small stone in cubic centimeters?
科学课上，每组一个长方体水槽，从里面量长是20厘米，宽15厘米，高是10厘米，里面的水深是6厘米，小冬把一块小石头放进水槽后(小石头完全浸没水中)，水面上升了2厘米，这块小石头的体积是多少立方厘米？
<gadget id="calculator">20 * 15 * 2</gadget>
<output>600</output>

<result>600</result>