A cube tank with a side length of 10 cm and 8 cm deep water is filled in it. After a stone is gently placed in it, the stone is completely submerged in the water, and the water overflows by 30 cm**3. What is the volume of the stone?
一个正方体水槽，棱长是10cm，里面装有8cm深的水，然后轻轻放入一块石头后，石头完全浸没在水里，水溢出了30cm**3，那么这块石头的体积是多少？
<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">10 * 10 * 2</gadget>
<output>200</output>

<gadget id="calculator">200 + 30</gadget>
<output>230</output>

<result>230</result>