The oil yield of rapeseed is 42%. How many kilograms of rapeseed do you need to extract 2,100 kilograms of rapeseed oil from an oil mill?
油菜籽的出油率是42%，一个榨油厂榨出菜籽油2100千克，需要多少千克的油菜籽？
<gadget id="calculator">42 / 100</gadget>
<output>21/50 = around 0.42</output>

<gadget id="calculator">2_100 / (21/50)</gadget>
<output>5_000</output>

<result>5_000</result>