CCTV's "News Network" starts broadcasting at 7:00 pm every day, how much is expressed in 24 o'clock timekeeping.
中央电视台《新闻联播》每天开始播出的时间是晚上7：00，用24时计时法表示是多少．
<gadget id="calculator">7 + 12</gadget>
<output>19</output>

<result>19</result>