The distance between Beijing and Shanghai is about 1,050 kilometers. On a map with a scale of 1:30,000,000, how many centimeters is the distance between the two places?
北京到上海大约相距1050千米，在比例尺为1：30000000的一幅地图上，量得两地相距多少厘米？
<gadget id="calculator">1 / 30_000_000</gadget>
<output>1/30_000_000 = around 0</output>

<gadget id="calculator">1_050 * 100_000 * (1/30_000_000)</gadget>
<output>7/2 = around 3.5</output>

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