On a map with a scale of 1:3000, a line segment of 5 cm represents the actual distance in meters.
在比例尺为1：3000的地图上，5厘米的线段代表实际距离多少米．
<gadget id="calculator">1 / 3_000</gadget>
<output>1/3_000 = around 0.000333</output>

<gadget id="calculator">5 / (1/3_000)</gadget>
<output>15_000</output>

<gadget id="calculator">15_000 / 100</gadget>
<output>150</output>

<result>150</result>