On a map with a scale of 1:5,000,000, the distance between A and B is 6 cm. Two cars, A and B, drive from A and B at the same time and meet each other 2 hours later. Given that the speed ratio of cars A and B is 2:3, ask: how many kilometers does car B travel per hour?
在比例尺是1：5000000的地图上，量得A、B两地的距离是6cm，甲、乙两辆汽车同时从A、B两地相对开出，2小时后相遇．已知甲、乙两车的速度比为2：3，问：乙车每小时行多少千米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">6 / (1/5_000_000) / 100_000 / 2</gadget>
<output>150</output>

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

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

<gadget id="calculator">150 * (3/5)</gadget>
<output>90</output>

<result>90</result>