On a map with a scale of 1:5000000, the distance from Shanghai to Hangzhou is 3.5 cm. What is the actual distance in kilometers from Shanghai to Hangzhou?
在一幅比例尺为1：5000000的地图上，量得上海到杭州的距离是3.5厘米．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">3.5 / (1/5_000_000) / 100_000</gadget>
<output>175</output>

<result>175</result>