A cone-shaped rice pile has a base radius of 2 meters and a height of 1.5 meters. If each cubic meter of rice weighs 750 kilograms, how many tons does this pile of rice weigh?
一个圆锥形状的稻谷堆，底面半径为2米，高1.5米．如果每立方米的稻谷重为750千克，这堆稻谷重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">1.5 / 1_000</gadget>
<output>0.0015</output>

<gadget id="calculator">750 * (1/3) * 3.14 * 4 * 0.0015</gadget>
<output>4.71</output>

<result>4.71</result>