On a map, 5 centimeters represent the actual distance of 80 kilometers. What is the scale of this map?
在一幅地图上用5厘米表示实际距离80千米，这幅图的比例尺是多少
<gadget id="calculator">80 * 100_000</gadget>
<output>8_000_000</output>

<gadget id="calculator">5 / 8_000_000</gadget>
<output>1/1_600_000 = around 0.000001</output>

<result>1/1_600_000 = around 0.000001</result>