Xiaomei measured the distance between cities A and B on a map with a scale of 1:2,000,000 to be 3.5m. On another map with a scale of 1:500,000, what is the distance on the map between cities A and B?
小美在比例尺是1：2000000的地图上量得甲、乙两座城市之间的距离是3.5m．在另一比例尺是1：500000的地图上，甲、乙两座城市之间的图上距离是多少？
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">3.5 / (1/2_000_000)</gadget>
<output>7_000_000</output>

<gadget id="calculator">1 / 500_000</gadget>
<output>1/500_000 = around 0.000002</output>

<gadget id="calculator">7_000_000 * (1/500_000)</gadget>
<output>14</output>

<result>14</result>