There is a piece of solid wood processed into a cone, the diameter of its base is 4 decimeters. Then saw it into two pieces on average along the diameter of the bottom surface, and the surface area increases by 60 square decimeters. What is the volume of this conical solid wood? (π takes 3.14)
有一根加工成圆锥形的实木，它的底面直径为4分米．再把它沿着底面直径平均锯成两块，表面积增加了60平方分米，则这跟圆锥形实木的体积是多少．(π取3.14)
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">30 * (1/2)</gadget>
<output>15</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 15</gadget>
<output>62.8</output>

<result>62.8</result>