On a map, the actual distance of 80 km is represented by a line segment of 10 cm, what is the scale of the map
在一幅地图上，用10cm的线段表示80km的实际距离，则这幅地图的比例尺是多少
<gadget id="calculator">80 * 100_000</gadget>
<output>8_000_000</output>

<gadget id="calculator">10 / 8_000_000</gadget>
<output>1/800_000 = around 0.000001</output>

<result>1/800_000 = around 0.000001</result>