On the map of 1:1800000, there is a section of road with a length of 6cm. On another map, the length of the same road is 8cm. Find the scale of the other map.
在1：1800000的地图上一段6cm长的公路，在另外一幅地图上同样的这条公路长8cm，求另外这幅地图的比例尺．
<gadget id="calculator">1 / 1_800_000</gadget>
<output>1/1_800_000 = around 0.000001</output>

<gadget id="calculator">6 / (1/1_800_000)</gadget>
<output>10_800_000</output>

<gadget id="calculator">8 / 10_800_000</gadget>
<output>1/1_350_000 = around 0.000001</output>

<result>1/1_350_000 = around 0.000001</result>