In a cylindrical cup filled with water with a bottom diameter of 20 cm and a height of 15 cm, a cylindrical iron rod with a bottom radius of 5 cm and a height of 25 cm is placed vertically, what is the volume of overflowing water in milliliters ｡
在一注满水的底面直径是20厘米，高是15厘米的圆柱形杯中，垂直放入一根底面半径是5厘米，高是25厘米的圆柱形铁棒，溢出水的体积是多少毫升｡
<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 15</gadget>
<output>1_177.5</output>

<result>1_177.5</result>