On a map with a scale of 1:100000, the distance between A and B is 4 cm. What is the actual distance between A and B in kilometers?
在比例尺1：100000的地图上，甲乙两地相距4厘米，则甲乙两地的实际距离为多少千米．
<gadget id="calculator">1 / 100_000</gadget>
<output>1/100_000 = around 0.00001</output>

<gadget id="calculator">4 / (1/100_000) / 100_000</gadget>
<output>4</output>

<result>4</result>