The actual distance from A to B is about 120 kilometers. On a map with a scale of 1:3000000, what is the distance in centimeters?
从甲地到乙地的实际距离大约是120千米，在比例尺是1：3000000的地图上，距离是多少厘米．
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">120 * 100_000 * (1/3_000_000)</gadget>
<output>4</output>

<result>4</result>