A shopping mall is 40 kilometers away from the city center, what is the centimeter on a map with a scale of (1/200000).
某商场距市中心40千米，在一幅比例尺是(1/200000)的地图上是多少厘米．
<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">40 * 100_000 * (1/200_000)</gadget>
<output>20</output>

<result>20</result>