In a cylindrical cup with a diameter of 10 cm, put a conical iron block with a bottom radius of 3 cm and completely submerge it in water (the water does not overflow). At this time, the water level rises by 0.3 cm. What is the height of the conical iron block?
在一个直径是10厘米的圆柱形杯里，放入一个底面半径是3厘米的圆锥形铁块，并全部浸没在水中(水没有溢出)，这时水面上升了0.3厘米．圆锥形铁块高多少厘米？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">3 / 28.26</gadget>
<output>0.106157</output>

<gadget id="calculator">3.14 * 25 * 0.3 * 0.106157</gadget>
<output>2.499997</output>

<result>2.499997</result>