Cut a cone of wood with a circumference of 31.4 decimeters vertically along the diameter of the base, and the surface area increases by 60 square centimeters. What is the volume of this cone?
把一个底面周长是31.4分米的圆锥体木料，沿底面直径竖直剖开，表面积增加了60平方厘米，这个圆锥柱的体积是多少立方厘米？
<gadget id="calculator">31.4 / 3.14</gadget>
<output>10</output>

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

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

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

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 25 * 6 * (1/3)</gadget>
<output>157</output>

<result>157</result>