Bus No. 1 and No. 2 depart from Jiangyin Bus Station at 5:30 at the same time. Bus No. 1 departs every 5 minutes, and Bus No. 2 departs every 6 minutes. After how many minutes did the two buses depart from the station at the same time?
1路公交车和2路公交车5：30同时从江阴公交车站出发，1路公交车每隔5分钟发出一辆，2路公交车每隔6分钟发出一辆．经过多少分钟两路公交车有同时从车站出发？
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>