800 kg of rapeseed is used to extract 320 kg of rapeseed oil, what is the oil yield of rapeseed?
用800千克油菜籽榨出菜油320千克，油菜籽的出油率是多少．
<gadget id="calculator">320 / 800</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(2/5) * 1</gadget>
<output>2/5 = around 0.4</output>

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