A conical wheat pile has a base radius of 4 meters and a height of 1.5 meters. Each cubic meter of wheat weighs about 720 kilograms. How many kilograms does this pile of wheat weigh?
一个圆锥形小麦堆，底面半径4米，高1.5米．每立方米小麦约重720千克，这堆小麦约重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 1.5</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 * 720</gadget>
<output>18_086.4</output>

<result>18_086.4</result>