Two cars A and B are traveling toward each other from two places 340 kilometers apart at the same time. Car A travels 80 kilometers per hour, and car B travels 90 kilometers per hour. How many hours later will the two cars meet?
甲乙两车同时从相距340千米的两地相向而行，甲车每小时行80千米，乙车每小时行90千米，几小时后两车相遇？
<gadget id="calculator">80 + 90</gadget>
<output>170</output>

<gadget id="calculator">340 / 170</gadget>
<output>2</output>

<result>2</result>