On a map with a scale of 1:100000, the distance between A and B is 3 cm. What is the actual distance between A and B in kilometers?
在比例尺是1：100000的地图上，量得甲、乙两地的距离是3厘米，甲、乙两地的实际距离是多少千米
<gadget id="calculator">1 / 100_000</gadget>
<output>1/100_000 = around 0.00001</output>

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

<result>3</result>