The distance between A and B is 1400 meters, how many centimeters should be drawn on the map of 1:40000
甲、乙两地1400米，画在1：40000的地图上，应画多少厘米
<gadget id="calculator">1_400 * 100</gadget>
<output>140_000</output>

<gadget id="calculator">1 / 40_000</gadget>
<output>1/40_000 = around 0.000025</output>

<gadget id="calculator">140_000 * (1/40_000)</gadget>
<output>7/2 = around 3.5</output>

<result>7/2 = around 3.5</result>