On a map with a scale of 1:5000000, the distance between the two places is 4.8 cm. How many hours does it take for a car to go back and forth between these two places at a speed of 60 kilometers per hour?
在一张比例尺是1：5000000的地图上，量得两地距离是4.8厘米．一辆汽车以每小时60千米的速度在这两地往返一次需多少小时．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">4.8 / (1/5_000_000) / 100_000</gadget>
<output>240</output>

<gadget id="calculator">2 / 60</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">240 * (1/30)</gadget>
<output>8</output>

<result>8</result>