A conical lead cone has a base diameter of 8 cm and a height of 7.5 cm. What is the volume of this lead cone?
一个圆锥形的铅锥，底面直径是8厘米，高7.5厘米，这个铅锥体积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 7.5</gadget>
<output>125.6</output>

<result>125.6</result>