Uncle Wang piled the harvested rice into a cone shape. The radius of the bottom surface of the cone was measured to be 2 meters, and the height was 0.9 meters. If each cubic meter of rice weighs 745 kilograms, how many tons of rice did Uncle Wang harvest?
王伯伯把收获的水稻堆成一个圆锥形，量得圆锥底面半径为2米，高为0.9米．如果每立方米水稻重745千克，那么王伯伯收获的水稻共重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">0.9 / 1_000</gadget>
<output>0.0009</output>

<gadget id="calculator">745 * (1/3) * 3.14 * 2 * 2 * 0.0009</gadget>
<output>2.80716</output>

<result>2.80716</result>