On a map with a scale of 1:3000000, the distance between A and B is 8 centimeters. Now a passenger car and a truck drive from the two places at the same time. After meeting each other for 3 hours, the passenger car travels 45 kilometers per hour. How many miles does the train travel per hour.
在比例尺是1：3000000的地图上，甲、乙两地的距离是8厘米，现在有一辆客车和一辆货车同时从两地相对开出，经过3小时相遇，客车每小时行45千米，火车每小时行多少千米．
<gadget id="calculator">30 * 8</gadget>
<output>240</output>

<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 - 45</gadget>
<output>35</output>

<result>35</result>