The length of a road is 1 km, and the length drawn on the drawing is 5 cm. So, 1 cm on the picture represents the actual distance in meters.
一条路长1千米，画在图纸上是5厘米．那么，图上1厘米表示实际距离多少米．
<gadget id="calculator">1_000 / 5</gadget>
<output>200</output>

<gadget id="calculator">1 * 200</gadget>
<output>200</output>

<result>200</result>