A cylindrical block with a base diameter of 4 cm and a height of 3 cm is cut into the largest cone. What is the volume of the cone in cubic centimeters?
把一个底面直径是4厘米，高是3厘米的圆柱形木块，削成一个最大的圆锥体，这个圆锥的体积是多少立方厘米．
<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">(1/3) * 3.14 * 4 * 3</gadget>
<output>12.56</output>

<result>12.56</result>