It takes 5 hours for a passenger car to travel from Yunyang to Yongchuan, and an average of 60 kilometers per hour for a truck. The two vehicles travel from Yunyang and Yongchuan at the same time and meet each other in 3 hours. How many kilometers is Yunyang from Yongchuan?
客车从云阳到永川要行5小时，货车平均每小时行60千米，两车分别从云阳、永川两地同时相向而行，3小时相遇，云阳距永川多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">60 * (15/2)</gadget>
<output>450</output>

<result>450</result>