Two trains, A and B, are traveling towards each other from two places 770 kilometers apart. Train A travels 45 kilometers per hour, and train B travels 41 kilometers per hour. Train B leaves first and then A does not leave. How many hours later does car A meet car B?
甲、乙两列火车从相距770千米的两地相向而行，甲车每小时行45千米，乙车每小时行41千米，乙车先出发2小时后，甲车才出发．甲车行几小时后与乙车相遇？
<gadget id="calculator">41 * 2</gadget>
<output>82</output>

<gadget id="calculator">770 - 82</gadget>
<output>688</output>

<gadget id="calculator">45 + 41</gadget>
<output>86</output>

<gadget id="calculator">688 / 86</gadget>
<output>8</output>

<result>8</result>