On a map with a scale of 1:2000000, the length of the railway between the two cities is measured to be 40 cm. Two trains A and B depart from opposite places at the same time and meet each other in 4 hours. It is known that the speed ratio of car A to car B is 3:2, how many kilometers does car A travel per hour?
在比例尺是1：2000000的地图上，量得两个城市之间的铁路长是40厘米．甲乙两列火车同时两地出发相对开出，4小时相遇．已知甲车与乙车速度的比是3：2，甲车每小时行多少千米？
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">40 / (1/2_000_000) / 100_000 / 4</gadget>
<output>200</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">200 * (3/5)</gadget>
<output>120</output>

<result>120</result>