The length of the railway from Shanghai to Hangzhou drawn on a map with a scale of 1:5,000,000 is 3 centimeters. Calculate, how many kilometers is the actual distance from Shanghai to Hangzhou?
上海到杭州的铁路长度画在比例尺1：5000000的地图上是3厘米．计算一下，上海到杭州的实际距离是多少千米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">3 / (1/5_000_000) / 100_000</gadget>
<output>150</output>

<result>150</result>