On a map with a scale of 1:60000000, a road is 2.4 cm long. What is the actual length of this road in kilometers?
在比例尺是1：60000000的地图上，一条公路长2.4厘米，这条公路实际长度是多少千米．
<gadget id="calculator">1 / 60_000_000</gadget>
<output>1/60_000_000 = around 0</output>

<gadget id="calculator">2.4 / (1/60_000_000) / 100_000</gadget>
<output>1_440</output>

<result>1_440</result>