Two trains, A and B, are traveling opposite each other. A train travels 76 kilometers per hour, and train B travels 69 kilometers per hour. One hour after car A leaves, car B leaves. After another 2.1 hours, the two cars meet again. How many kilometers is the length of the railway between the two places?
甲、乙两列火车从两地相对行驶，甲车每小时行76千米，乙车每小时行69千米．甲车开出1小时后，乙车才开出，再过2.1小时两车相遇，两地间的铁路长多少千米？
<gadget id="calculator">76 + 69</gadget>
<output>145</output>

<gadget id="calculator">145 * 2.1</gadget>
<output>304.5</output>

<gadget id="calculator">304.5 + 76</gadget>
<output>380.5</output>

<result>380.5</result>