On a map with a scale of 1:3500000, the distance between A and B is 2.4 cm. What is the actual distance in kilometers between A and B?
在比例尺是1：3500000的地图上，量得甲、乙两地之间的距离是2.4厘米，求甲、乙两地实际距离是多少千米？
<gadget id="calculator">1 / 3_500_000</gadget>
<output>1/3_500_000 = around 0</output>

<gadget id="calculator">2.4 / (1/3_500_000) / 100_000</gadget>
<output>84</output>

<result>84</result>