A, B, and C are walking together. A walks 60 meters per minute, B walks 50 meters per minute, and C walks 40 meters per minute. A starts from A, and B and C start from B at the same time and walk towards each other. After meeting A and B, they meet C again 15 minutes later. Find the distance between A and B.
甲、乙、丙三人行路，甲每分钟走60米，乙每分钟走50米，丙每分钟走40米．甲从A地，乙和丙从B地同时出发相向而行，甲和乙相遇后，过了15分钟又与丙相遇，求A、B两地间的距离．
<gadget id="calculator">60 + 40</gadget>
<output>100</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<gadget id="calculator">15 / 10</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">60 + 50</gadget>
<output>110</output>

<gadget id="calculator">100 * (3/2) * 110</gadget>
<output>16_500</output>

<result>16_500</result>