On a drawing with a scale of 50:1, the distance between points A and B on the map is 2 cm. What is the actual distance between points A and B?
在比例尺是50：1的图纸上，A，B两点之间的图上距离是2厘米，A，B之间的实际距离是多少．
<gadget id="calculator">50 / 1</gadget>
<output>50</output>

<gadget id="calculator">2 / 50</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>