There is a cylindrical water storage tank with a bottom diameter of 20 cm, and a cylindrical iron block with a height of 10 cm is immersed in the water. If the cylindrical iron block is pulled out of the water 4 cm vertically, the water level will drop 2 cm. What is the volume in cubic centimeters of the cylindrical iron block?
有一个圆柱形储水箱，底面直径为20厘米，将一个高10厘米的圆柱形铁块浸没在水中．如果把圆柱形铁块竖着拉出水面4厘米，水面就会下降2厘米．圆柱形铁块的体积是多少立方厘米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">100 * 3.14 * (1/2)</gadget>
<output>157</output>

<gadget id="calculator">157 * 10</gadget>
<output>1_570</output>

<result>1_570</result>