A cylindrical water cup has a bottom radius of 10 cm and a water depth of 11 cm. After putting some Yuhua stones, the water level in the cup rises to 15 cm. What is the volume of the Yuhua stones?
一个圆柱形水杯，底面半径为10厘米，里面水深为11厘米，放入一些雨花石后，杯中水面上升到15厘米，雨花石的体积是多少？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">15 - 11</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 100 * 4</gadget>
<output>1_256</output>

<result>1_256</result>