There is an electronic watch that rings at the hour and lights up every 18 minutes. If the digital watch both rings and lights at 2 p.m., when is the next time it both rings and lights?
有一块电子表，在整时响铃，每走18分钟亮一次灯．如果这块电子表在下午2时既响铃又亮灯，那么下一次既响铃又亮灯是什么时间？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<result>5</result>