Among A, B, and C, A walks 40 meters per minute, B walks 50 meters per minute, and C walks 60 meters per minute. A and B start from East Town, and C starts from West Town at the same time. After another 2 minutes, B encounters A. How many meters are the distance between the two towns?
甲、乙、丙三人中，甲每分钟走40米，乙每分钟走50米，丙每分钟走60米，甲、乙两人从东镇，丙从西镇同时相向出发，丙遇到乙后再经过2分钟遇到甲，两镇相距多少米．
<gadget id="calculator">50 + 60</gadget>
<output>110</output>

<gadget id="calculator">40 + 60</gadget>
<output>100</output>

<gadget id="calculator">100 * 2</gadget>
<output>200</output>

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

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

<gadget id="calculator">110 * 20</gadget>
<output>2_200</output>

<result>2_200</result>