Mama Li travels from A to B, (7/10) by train, and the ratio of the distance by car to that by bicycle is 2:1. It is known that the distance by car is 150 kilometers less than that by train. Find the distance between A and B. How many kilometers away are the places?
李妈从甲地到乙地，(7/10)的路程乘火车，乘汽车和骑自行车的路程比是2：1，已知乘汽车的路程比乘火车的少150千米，求甲乙两地相距多少千米？
<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<gadget id="calculator">7 + 2 + 1</gadget>
<output>10</output>

<gadget id="calculator">30 * 10</gadget>
<output>300</output>

<result>300</result>