Find the volume of a cone with a base diameter of 10 cm and a height of 1.5 decimeters.
底面直径10厘米，高1.5分米的圆锥，求它的体积．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">1.5 * 10</gadget>
<output>15</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 15</gadget>
<output>392.5</output>

<result>392.5</result>