If a metal cone with a base diameter of 20 cm and a height of 15 cm is completely submerged in a cylindrical tank with a diameter of 40 cm, how many centimeters will the water level of the tank rise?
将一个底面直径是20厘米，高为15厘米的金属圆锥体，全部浸没在直径是40厘米的圆柱形水槽中，水槽水面会升高多少厘米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">3.14 * 20 * 20</gadget>
<output>1_256</output>

<gadget id="calculator">(1/3) / 1_256</gadget>
<output>1/3_768 = around 0.000265</output>

<gadget id="calculator">3.14 * 10 * 10 * 15 * (1/3_768)</gadget>
<output>1.25</output>

<result>1.25</result>