1 centimeter on the map represents the actual distance of 50 kilometers, what is the scale of this map
地图上1厘米表示实际距离50千米，这幅地图的比例尺是多少
<gadget id="calculator">50 * 100_000</gadget>
<output>5_000_000</output>

<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<result>1/5_000_000 = around 0</result>