4 kg of peanut oil is extracted from 10 kg of peanuts, how many kg of peanut oil is squeezed out on average per kg of peanuts?
用10千克花生榨了4千克花生油，平均每千克花生榨多少千克花生油？
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>