The distance between A and B is 5850 km. A train travels from A to B at a speed of 150 km/h. After 23 hours, the speed is increased, and after the speed is increased, it is driven for another 12 hours to reach point B. What is the speed of the train after the speed increase?
甲乙两地相距5850千米．一列火车以150千米/时的速度从甲地开往乙地．23小时后提速，提速后又开了12小时到达乙地，提速后火车的速度是多少？
<gadget id="calculator">150 * 23</gadget>
<output>3_450</output>

<gadget id="calculator">5_850 - 3_450</gadget>
<output>2_400</output>

<gadget id="calculator">2_400 / 12</gadget>
<output>200</output>

<result>200</result>