A car consumes (2/5) kilograms of fuel for 3km, how many kilometers per kilogram of gasoline on average.
一辆汽车行驶3km耗油(2/5)千克，平均每千克汽油行驶多少km．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / (2/5)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>