There is a cylindrical container with a bottom diameter of 20 cm. A conical iron block with a bottom circumference of 18.84 cm and a height of 20 cm is submerged in the water of the container. When the iron block is taken out, how many centimeters does the water level of the container drop?
有一个底面直径是20厘米的圆柱形容器，容器的水中浸没一个底面周长18.84厘米，高20厘米的圆锥形铁块，当取出铁块后，容器水面下降了多少厘米？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">(1/3) / 314</gadget>
<output>1/942 = around 0.001062</output>

<gadget id="calculator">3.14 * 9 * 20 * (1/942)</gadget>
<output>0.6</output>

<result>0.6</result>