On the map with a scale of 1:35000000, the length of the railway from Beijing to Hangzhou is measured to be 4.7 cm. How many kilometers is the actual length of this railway? (in two ways)
在比例尺是1：35000000地图上，量得北京到杭州的铁路长4.7厘米，这条铁路实际长多少千米？(用两种方法)
<gadget id="calculator">1 / 35_000_000</gadget>
<output>1/35_000_000 = around 0</output>

<gadget id="calculator">4.7 / (1/35_000_000) / 100_000</gadget>
<output>1_645</output>

<result>1_645</result>