A lead cone is immersed in a cylindrical pool with a base circumference of 12.56 meters and a height of 6 meters. The water level rose by 3 decimeters. What is the volume of the lead cone?
把一个铅圆锥浸入一个底面周长是12.56米，高6米的圆柱形水池．水面上升了3分米．铅圆锥的体积是多少？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 0.3</gadget>
<output>3.768</output>

<result>3.768</result>