batch of wheat is piled up in a cone shape, the diameter of the bottom surface is 4 meters, and the height is 3 meters. How many cubic meters is the pile of wheat?
一批小麦堆成圆锥形，底面直径4米，高是3米，这堆小麦有多少立方米？
<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>