A train travels from place A to place B. It travels 415 kilometers in the first 3 hours, and then travels at a speed of 150 kilometers per hour for 4 hours. It arrives at place B. What is the average speed of this train?
一列火车从甲地开往乙地，前3小时行了415千米，后来每小时150千米的速度行了4小时，到达了乙地，求这辆车的平均速度是多少？
<gadget id="calculator">150 * 4</gadget>
<output>600</output>

<gadget id="calculator">600 + 415</gadget>
<output>1_015</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">1_015 / 7</gadget>
<output>145</output>

<result>145</result>