On a map with a scale of 1:8,000,000, the Beijing-Guangzhou Railway is measured to be 29 centimeters long, and how many hours does it take for a bullet train to travel from Beijing to Guangzhou at an average speed of 160 kilometers per hour.
在一幅比例尺为1：8000000的地图上，量得京广铁路长29厘米，一列动车以平均每小时160千米的速度从北京开往广州，一共用了多少小时．
<gadget id="calculator">1 / 8_000_000</gadget>
<output>1/8_000_000 = around 0</output>

<gadget id="calculator">29 / (1/8_000_000) / 100_000 / 160</gadget>
<output>29/2 = around 14.5</output>

<result>29/2 = around 14.5</result>