rectangular rice field is 800 meters long and 500 meters wide. It is estimated that 10 tons of rice can be harvested per hectare, and the yield rate of rice is 70%. How many kilograms of rice can be milled from this field?
一块长方形稻田，长800米，宽500米，预计每公顷可收稻谷10吨，稻谷的出米率为70%，这块地收的稻谷可碾米多少千克？
<gadget id="calculator">500 / 10_000</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">10 * 800 * (1/20) * (7/10) * 1_000</gadget>
<output>280_000</output>

<result>280_000</result>