The railway from Tianjin to Hangzhou is 1500 kilometers long. On a map with a scale of 1:50000000, what is its length in centimeters?
天津到杭州的铁路长1500千米，在一幅比例尺是1：50000000的地图上，它的长是多少厘米．
<gadget id="calculator">1 / 50_000_000</gadget>
<output>1/50_000_000 = around 0</output>

<gadget id="calculator">1_500 * 100_000 * (1/50_000_000)</gadget>
<output>3</output>

<result>3</result>