A and B depart from East Town and C from West Town at the same time. A travels 4km per hour, B travels 5km per hour, and C travels 6km per hour. C meets A 12 minutes after meeting B. Find the distance between the two towns km?
甲、乙从东镇，丙从西镇同时相向出发，甲每小时行4km，乙每小时行5km，丙每小时行6km，丙遇到乙后12分钟在遇到甲，求两镇相距多少千米？
<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

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

<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">0.2 * 10 * 11</gadget>
<output>22</output>

<result>22</result>