The speeds of A, B, and C are 30 meters, 40 meters, and 50 meters per minute respectively. A and B set off at the same time at point A, and C sets off at the same time from point B to catch up with A and B. After C catches up with A, he passes by If it takes 10 minutes to catch up with B, what is the distance between AB and AB?
甲、乙、丙三人每分钟的速度分别为30米、40米、50米，甲、乙在A地同时同向出发，丙从B地同时出发去追赶甲乙，丙追上甲以后又经过10分钟才追上乙，则AB两地的距离是多少．
<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<gadget id="calculator">40 - 30</gadget>
<output>10</output>

<gadget id="calculator">10 / 10</gadget>
<output>1</output>

<gadget id="calculator">50 - 30</gadget>
<output>20</output>

<gadget id="calculator">10 * 1 * 20</gadget>
<output>200</output>

<result>200</result>