The scale of a map is 1:15,000,000. On this map, what is the actual distance in kilometers represented by 4 centimeters?
一幅地图的比例尺是1：15000000，在这幅地图上4厘米表示的实际距离是多少千米．
<gadget id="calculator">1 / 15_000_000</gadget>
<output>1/15_000_000 = around 0</output>

<gadget id="calculator">4 / (1/15_000_000) / 100_000</gadget>
<output>600</output>

<result>600</result>