The distance between A and B is 15 kilometers. A car has traveled the whole distance (2/5). How many kilometers has this car traveled?
甲乙两地相距15千米，一辆汽车已经行了全程的(2/5)，这辆汽车已经行使了多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">15 * (2/5)</gadget>
<output>6</output>

<result>6</result>