Car A travels from city A to city B in 3 hours, and car B travels from city B to city A in 5 hours. Two cars depart from city A and city B respectively at the same time, how many hours later will they meet?
甲车从A城市到B城市要行驶3小时，乙车从B城市到A城市要行驶5小时．两车同时分别从A城市和B城市出发，几小时后相遇？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/3) + (1/5)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">1 / (8/15)</gadget>
<output>15/8 = around 1.875</output>

<result>15/8 = around 1.875</result>