(4/5) kg of rapeseed can extract oil (1/3) kg, how much kg of rapeseed can extract oil
(4/5)千克菜籽可榨油(1/3)千克，每千克菜籽可榨油多少千克多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(1/3) / (4/5)</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>