A passenger car and a truck depart from A and B in opposite directions at the same time and meet each other in 6 hours. Given that the speed ratio of passenger cars to trucks is 3:2, how many hours does it take for the truck to complete the journey?
客车与货车同时从甲乙两地相向开出，6小时相遇．已知客车与货车的速度比是3：2，货车行完全程需多少小时？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

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

<gadget id="calculator">(1/6) * (2/5)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / (1/15)</gadget>
<output>15</output>

<result>15</result>