On a map with a scale of 1:400,000, the distance from Changchun to Jilin is 26 cm. It is known that a truck travels 52 kilometers per hour. How long does it take for this truck to travel from Changchun to Jilin?
在比例尺是1：400000的地图上量得长春到吉林的距离是26厘米，已知一列货车每小时行52千米，这列货车从长春到吉林要行多少小时？
<gadget id="calculator">1 / 400_000</gadget>
<output>1/400_000 = around 0.000002</output>

<gadget id="calculator">26 / (1/400_000) / 100_000 / 52</gadget>
<output>2</output>

<result>2</result>