On a map with a scale of 1:270000, points A and B represent Lijiacun and Wangjiacun respectively, and it is known that AB=7cm, so how many kilometers is the distance between Lijiacun and Wangjiacun?
在比例尺为1：270000的地图上，A、B两点分别代表李家村和王家村，已知AB=7cm，那么李家村和王家村相距多少km．
<gadget id="calculator">1 / 270_000</gadget>
<output>1/270_000 = around 0.000004</output>

<gadget id="calculator">7 / (1/270_000) / 100_000</gadget>
<output>189/10 = around 18.9</output>

<result>189/10 = around 18.9</result>