The oil yield of rapeseed is 38%, how many kilograms of rapeseed are needed to extract 1140 kg of rapeseed oil.
油菜籽的出油率为38%，要榨1140千克菜籽油需要多少千克油菜籽．
<gadget id="calculator">38 / 100</gadget>
<output>19/50 = around 0.38</output>

<gadget id="calculator">1_140 / (19/50)</gadget>
<output>3_000</output>

<result>3_000</result>