(4/5) tons of soybeans can extract (4/7) tons of oil, how many tons of soybeans are needed to squeeze 1 ton of soybean oil.
(4/5)吨大豆可以榨油(4/7)吨，榨1吨大豆油需要多少吨大豆．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 / (4/7)</gadget>
<output>7/4 = around 1.75</output>

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

<gadget id="calculator">(7/4) * (4/5)</gadget>
<output>7/5 = around 1.4</output>

<result>7/5 = around 1.4</result>