A conical coal pile has a base radius of 1.5m and a height of 1.1m. What is the volume of this pile of coal.
一个圆锥形的煤堆，底面半径是1.5m，高是1.1m．这个煤堆的体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">(1/3) * 3.14 * 2.25 * 1.1</gadget>
<output>2.5905</output>

<result>2.5905</result>