On a map with a scale of (1/1000000), the distance between Wuhan and Qianjiang on the map is 20 cm. What is the actual distance between Wuhan and Qianjiang in kilometers?
在一幅比例尺是(1/1000000)的地图上，量得武汉到潜江的图上距离是20厘米，武汉到潜江的实际距离是多少千米．
<gadget id="calculator">1 / 1_000_000</gadget>
<output>1/1_000_000 = around 0.000001</output>

<gadget id="calculator">20 / (1/1_000_000) / 100_000</gadget>
<output>200</output>

<result>200</result>