A certain place is 5000 kilometers long from east to west. What is the length in centimeters measured on a map with a scale of 1:50000000?
某地东西长5000千米，在比例尺是1：50000000的地图上量得长度是多少厘米．
<gadget id="calculator">1 / 50_000_000</gadget>
<output>1/50_000_000 = around 0</output>

<gadget id="calculator">5_000 * 100_000 * (1/50_000_000)</gadget>
<output>10</output>

<result>10</result>