On a map with a scale of 1:15,000,000, the measured distance from Zhengzhou to Lianyungang is 4 cm. Xiaoliang's family of three drove to Lianyungang for vacation at a speed of 100 kilometers. They set off from Zhengzhou at 8:00 in the morning. When will they arrive in Lianyungang in the afternoon?
在一幅比例尺为1：15000000的地图上，测得郑州到连云港的距离是4厘米．小亮一家三口开车去连云港度假，车速为100千米，他们上午8：00从郑州出发，大约下午几时能到达连云港？
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