(3/5) kg of rapeseed can extract (1/4) kg of oil, how many kg of rapeseed is needed to squeeze 1 kg of oil.
(3/5)千克油菜籽可榨油(1/4)千克，榨1千克油要多少千克油菜籽．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/5) / (1/4)</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>