cylinder with a base diameter of 20 cm contains some water, and a cone with a base diameter of 10 cm and a height of 9 cm is completely submerged in water. How many centimeters will the water level drop if the cone is removed from the water?
在一个底面直径为20厘米的圆柱形容器中，装有一些水，一个底面直径10厘米，高9厘米的圆锥完全浸没在水中．如果把圆锥从水中取出，水面下降多少厘米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</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">9 / 314</gadget>
<output>9/314 = around 0.028662</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * (9/314)</gadget>
<output>0.75</output>

<result>0.75</result>