A cube is a water tank with sides 40 cm long. If a stone is immersed in water, the water level will rise by 2 cm. What is the volume of this stone?
一个正方体水箱，棱长40厘米．如果将一块石头浸入水中，水面上升2厘米．这块石头的体积是多少？
<gadget id="calculator">40 * 40 * 2</gadget>
<output>3_200</output>

<result>3_200</result>