5 kg of rapeseed can be used to extract 2 kg of rapeseed oil, how many kg of rapeseed is needed to squeeze 1 kg of rapeseed oil on average.
用5千克菜籽可榨2千克菜籽油，平均榨1千克菜籽油需要菜籽多少千克．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>