The distance between A and B is 342 km. A truck leaves from station A and travels 48 kilometers per hour; another bus departs from station B and travels 66 kilometers per hour. The two cars leave at the same time, heading towards each other, how many hours have passed before they meet?
A、B两地相距342千米．一辆货车从A地开出，每小时行驶48千米；另一辆客车从B站开出，每小时行66千米．两车同时开出，相向而行，经过几小时相遇？
<gadget id="calculator">48 + 66</gadget>
<output>114</output>

<gadget id="calculator">342 / 114</gadget>
<output>3</output>

<result>3</result>