The distance between Guangzhou and Shantou is about 440 km. Car A travels 86 km per hour, and car B travels 90 km per hour. The two cars start from the two places at the same time and drive towards each other. After how many hours do the two cars meet?
广州与汕头相距约440km，甲车每小时行86km，乙车每小时行90km，两车分别从两地同时出发相向而行，经过几小时两车相遇？
<gadget id="calculator">86 + 90</gadget>
<output>176</output>

<gadget id="calculator">440 / 176</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>