Cars A and B are traveling toward each other from places A and B at the same time. Car A travels 40 kilometers per hour, and car B travels 35 kilometers per hour. The two cars meet at a distance of 15 kilometers from the midpoint. Find the two places AB What is the distance?
甲、乙两车从A、B两地同时相向而行，甲车每小时行40千米，乙车每小时行35千米，两车在距中点15千米处相遇，求AB两地相距是多少？
<gadget id="calculator">40 - 35</gadget>
<output>5</output>

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

<gadget id="calculator">40 + 35</gadget>
<output>75</output>

<gadget id="calculator">15 * (2/5) * 75</gadget>
<output>450</output>

<result>450</result>