The area of the base of the cylinder and the cone are equal to the height, the diameter of the base of the cylinder is 4 cm, and the height is 6 cm. What is the volume of the cone?
圆柱与圆锥的底面面积与高相等，圆柱底面直径4厘米，高6厘米，圆锥的体积是多少？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

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

<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<result>25.12</result>