A train of passenger cars and a train of freight trains depart from places A and B opposite each other at the same time. The passenger car travels 65 kilometers per hour, and the truck travels 50 kilometers per hour. After 4 o'clock, the distance between A and B is still 60 kilometers. How many kilometers is the distance between A and B?
一列客车和一列货车同时从甲、乙两地相对开出．客车每时行65千米，货车每时行50千米，经过4时后还相距60千米，甲乙两地相距多少千米？
<gadget id="calculator">65 + 50</gadget>
<output>115</output>

<gadget id="calculator">115 * 4</gadget>
<output>460</output>

<gadget id="calculator">460 + 60</gadget>
<output>520</output>

<result>520</result>