If a car needs 3/5 liters of gasoline to travel 7.5 kilometers, how many kilometers can it travel with 1 liter of gasoline?
一辆汽车行7.5千米需要汽油(3/5)升，那么用1升汽油可行多少千米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">7.5 / (3/5)</gadget>
<output>12.5</output>

<result>12.5</result>