The oil yield rate of a kind of corn is 40%, how many kilograms of this kind of corn are needed to squeeze out 200 kilograms of corn oil? (solution with equation)?
一种玉米的出油率是40%，要榨出200千克的玉米油，需要这种玉米多少千克？(用方程解答)？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">200 / (2/5)</gadget>
<output>500</output>

<result>500</result>