(7/10) tons of peanuts can extract (2/5) tons of peanut oil, so how many tons of peanuts are needed to extract 1 ton of oil? What is the column
(7/10)吨花生可以榨油(2/5)吨花生油，那么要求榨1吨油需要多少吨花生？列式是多少
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(7/10) / (2/5)</gadget>
<output>7/4 = around 1.75</output>

<result>7/4 = around 1.75</result>