The straight-line distance from Beijing to Tianjin is 150 kilometers. What is the distance drawn on a map with a scale of 1:2000000?
北京到天津的直线距离是150千米，画在比例尺是1：2000000的地图上的距离是多少．
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">150 * 100_000 * (1/2_000_000)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>