The scale of a design drawing is 1:2,000,000. The distance between A and B is 0.5 cm measured on this drawing. What is the actual distance between A and B?
一张设计图纸的比例尺是1：2000000，在这幅图上量得A、B两点间的距离是0.5厘米，那么A、B两点间的实际距离是多少．
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">0.5 / (1/2_000_000) / 100_000</gadget>
<output>10</output>

<result>10</result>