A cylindrical cup with a bottom diameter of 24 cm is filled with water, and a conical iron block with a bottom diameter of 12 cm and a height of 18 cm is submerged in the water. When the iron block is taken out of the cup, the water surface in the cup will How many centimeters did it drop?
一个底面直径是24厘米的圆柱形杯中装有水，水里浸没了一个底面直径是12厘米、高18厘米的圆锥形铁块，当把铁块从杯中取出时，杯中的水面会下降多少厘米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">3.14 * 144</gadget>
<output>452.16</output>

<gadget id="calculator">18 / 452.16</gadget>
<output>0.039809</output>

<gadget id="calculator">(1/3) * 3.14 * 36 * 0.039809</gadget>
<output>1.500003</output>

<result>1.500003</result>