The distance between a certain place and Chengdu is measured on the map as 4.5cm. The scale of this map is 1:30000. What is the actual distance between a certain place and Chengdu?
在地图上测得某地到成都的图上距离为4.5cm，这副地图的比例尺是1：30000，某地到成都的实际距离为多少．
<gadget id="calculator">1 / 30_000</gadget>
<output>1/30_000 = around 0.000033</output>

<gadget id="calculator">4.5 / (1/30_000) / 100_000</gadget>
<output>1.35</output>

<result>1.35</result>