If the distance between the two places is 10 cm measured on a map with a scale of (1/30000), what is the actual distance in kilometers between the two places?
在比例尺是(1/30000)的地图上量得两地之间的距离是10厘米，两地实际距离是多少千米．
<gadget id="calculator">1 / 30_000</gadget>
<output>1/30_000 = around 0.000033</output>

<gadget id="calculator">10 / (1/30_000) / 100_000</gadget>
<output>3</output>

<result>3</result>