On the map of China with a scale of 1:4000000, the length of the railway from A to B is 35 cm. What is the actual length of this railway?
在比例尺是1：4000000的中国地图上，甲地到乙地的铁路长是35厘米，求这段铁路的实际长是多少？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">35 / (1/4_000_000) / 100_000</gadget>
<output>1_400</output>

<result>1_400</result>