The rice yield of millet is about 70%. How many kilograms of millet are needed to produce 840 kilograms of rice?
谷子的出米率大约是70%，要出米840千克，需要多少千克的谷子？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">840 / (7/10)</gadget>
<output>1_200</output>

<result>1_200</result>