The diameter of the bottom surface of a cylindrical glass container is 10cm. After a piece of iron is taken out of the container (5/8), the water level drops by 2cm. What is the volume of the piece of iron?
一个圆柱形玻璃容器的底面直径是10cm，把一块铁块从这个容器中取出(5/8)后，水面下降2cm，这块铁块的体积是多少？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">2 / (5/8)</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">3.14 * 25 * (16/5)</gadget>
<output>251.2</output>

<result>251.2</result>