On a 1:8000000 map, the distance on the map is 1 cm, what is the actual distance in kilometers?
在1：8000000的地图上，图上距离是1cm，实际距离是多少千米．
<gadget id="calculator">1 / 8_000_000</gadget>
<output>1/8_000_000 = around 0</output>

<gadget id="calculator">1 / (1/8_000_000) / 100_000</gadget>
<output>80</output>

<result>80</result>