Put an iron ball into a cylindrical measuring cup with a bottom diameter of 8 cm and a height of 10 cm. The water level rises from 5 cm to 7.5 cm. What is the volume of this iron ball in cubic centimeters? (The thickness of the measuring cup is ignored)
把一个铁球放入底面直径为8厘米，高为10厘米的圆柱形量杯中，水面由5厘米上升到7.5厘米．这个铁球的体积是多少立方厘米？(量杯的厚度忽略不计)
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">7.5 - 5</gadget>
<output>2.5</output>

<gadget id="calculator">3.14 * 16 * 2.5</gadget>
<output>125.6</output>

<result>125.6</result>