A stone is placed in a water cup with a base radius of 5 cm. The water level rises by 3 cm. What is the volume of the stone in cubic centimeters?
一个底面半径为5厘米的水杯，放入一块石头，水面上升了3厘米，求石头的体积是多少立方厘米？
<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 3</gadget>
<output>235.5</output>

<result>235.5</result>