On a map with a scale of (1/100000), the distance between A and B is 3.6 cm. If it is drawn on a map with a scale of (1/20000), then the distance between the two cities on the map is how many centimeters?
在比例尺是(1/100000)的地图上，量得甲、乙两个城市间的距离是3.6厘米，如果画在比例尺是(1/20000)的地图上，那么两个城市的图上距离是多少厘米？
<gadget id="calculator">1 / 100_000</gadget>
<output>1/100_000 = around 0.00001</output>

<gadget id="calculator">3.6 / (1/100_000)</gadget>
<output>360_000</output>

<gadget id="calculator">1 / 20_000</gadget>
<output>1/20_000 = around 0.00005</output>

<gadget id="calculator">360_000 * (1/20_000)</gadget>
<output>18</output>

<result>18</result>