A cylindrical water cup with a base radius of 5 cm contains a conical iron block with a base area of 30 cm2, which is completely submerged in water. If the iron block is taken out of the water, the water level will drop by 2 cm. What is the volume of the block in cubic centimeters.
一个圆柱形水杯，底面半径为5厘米，杯中有一个底面积是30平方厘米的圆锥形铁块，完全淹没在水中，如果从水中取出这块铁块，水面下降2厘米，这个圆锥形铁块的体积是多少立方厘米．
<gadget id="calculator">3.14 * 25 * 2</gadget>
<output>157</output>

<result>157</result>