The journey between places A and B takes 30 minutes and 20 minutes for A and B respectively. A and B set off from A and B at the same time respectively, and travel back and forth between the two places at a constant speed. The distance between the first meeting place and the second meeting place is exactly 152 meters. What is the distance between A and B?
A、B两地间的路程，甲、乙二人行完分别需要30分钟和20分钟．甲、乙分别从A、B两地同时出发，用不变的速度不停地往返于两地间，他们第一次相遇处和第二次相遇处之间路程刚好是152米．A、B两地间的路程是多少米？
<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/30) + (1/20)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / (1/12)</gadget>
<output>12</output>

<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<gadget id="calculator">30 - 12 - 6</gadget>
<output>12</output>

<gadget id="calculator">12 / 30</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">152 / (2/5)</gadget>
<output>380</output>

<result>380</result>