cylindrical glass with a base diameter of 10 decimeters contains some water. A cone with a base diameter of 6 decimeters and a height of 15 decimeters is immersed in water. When the cone is taken out, how many decimeters does the water in the cup drop?
一个底面直径是10分米的装有一些水的圆柱形玻璃杯．有一个底面直径为6分米，高为15分米的圆锥浸在水中，取出圆锥后，杯里的水下降多少分米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">(1/3) * 3.14 * 9 * 15</gadget>
<output>141.3</output>

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

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

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">141.3 / 78.5</gadget>
<output>1.8</output>

<result>1.8</result>