On a map with a scale of 1:30000000, the distance between A and B is 3 cm. Xiao Li takes a bullet train at a speed of 300 kilometers per hour from city A to city B, and he can get there in how many hours.
在比例尺是1：30000000的地图上量得A、B两城市相距3厘米．小李搭乘时速300千米的动车从A城到B城，多少小时便可到达．
<gadget id="calculator">1 / 30_000_000</gadget>
<output>1/30_000_000 = around 0</output>

<gadget id="calculator">3 / (1/30_000_000) / 100_000 / 300</gadget>
<output>3</output>

<result>3</result>