On a map with a scale of 1:3,000,000, the measured distance between A and B is 60 centimeters. A car drives from A to B at an average of 90 kilometers per hour. How long does it take to get there?
在比例尺是1：3000000的地图上，量的A、B两地的距离是60厘米，一辆汽车从A地开往B地，平均每小时行驶90千米，多少小时到达？
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">60 / (1/3_000_000) / 100_000 / 90</gadget>
<output>20</output>

<result>20</result>