On a map with a scale of 1:500, the distance between A and B is 9 cm. What is the actual distance between the two places?
在比例尺为1：500的地图上，量得甲、乙两地的距离是9厘米，两地的实际距离是多少．
<gadget id="calculator">1 / 500</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">9 / (1/500)</gadget>
<output>4_500</output>

<gadget id="calculator">4_500 / 100</gadget>
<output>45</output>

<result>45</result>