On a map, a line segment with a length of 3 cm represents an actual distance of 900 kilometers. How much is a highway with a length of 480 kilometers on this map?
在一幅地图上，3厘米长的线段表示实际距离900千米，一条长480千米的高速公路，在这幅地图上是多少．
<gadget id="calculator">900 * 100_000</gadget>
<output>90_000_000</output>

<gadget id="calculator">3 / 90_000_000</gadget>
<output>1/30_000_000 = around 0</output>

<gadget id="calculator">480 * 100_000 * (1/30_000_000)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>