The scale of a map is 1:750,000. On this map, the distance between A and B is 7.2 centimeters, so how many kilometers is the actual distance between the two places?
一幅地图的比例尺是1：750000，在这幅地图上量得甲乙两地间的距离为7.2厘米，那么两地间的实际距离大约为多少千米．
<gadget id="calculator">1 / 750_000</gadget>
<output>1/750_000 = around 0.000001</output>

<gadget id="calculator">7.2 / (1/750_000) / 100_000</gadget>
<output>54</output>

<result>54</result>