A, B, and C walk at speeds of 60 meters, 80 meters, and 100 meters per minute respectively. A and B set off at B at the same time, and C sets off at A at the same time to catch up with A and B. After catching up with A, it took another 10 minutes to catch up with B. Ask for the distance between A and B?
甲、乙、丙三人行走的速度分别是每分钟60米、80米、100米，甲、乙两人在B地同时同向出发，丙从A地同时同向出发追赶甲、乙，丙追上甲以后又过了10分钟才追上乙，求A、B两地的路程？
<gadget id="calculator">100 - 60</gadget>
<output>40</output>

<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">10 / 20</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 * (1/2)</gadget>
<output>20</output>

<gadget id="calculator">20 - 10</gadget>
<output>10</output>

<gadget id="calculator">40 * 10</gadget>
<output>400</output>

<result>400</result>