The radius of the bottom of a cylindrical glass is 10 cm, filled with water at a height of 12 cm, now a piece of iron is put into the glass, the water rises to 15 cm, what is the volume of this piece of iron in cubic centimeters?
一个圆柱形玻璃杯底面半径是10厘米，里面装了12厘米高的水，现在把一块铁块放进杯中，水面上升到15厘米，这块铁块的体积是多少立方厘米？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<gadget id="calculator">3.14 * 100 * 3</gadget>
<output>942</output>

<result>942</result>