On a map with a scale of 1:7500000, the distance between Wenzhou and Hangzhou is 6 cm. What is the actual distance between Wenzhou and Hangzhou in kilometers?
在比例尺1：7500000的地图上，量得温州到杭州两地的距离为6厘米，温州到杭州的实际距离是多少千米．
<gadget id="calculator">1 / 7_500_000</gadget>
<output>1/7_500_000 = around 0</output>

<gadget id="calculator">6 / (1/7_500_000) / 100_000</gadget>
<output>450</output>

<result>450</result>