A company broadcasts a 30-second advertisement in the prime time of the TV station to promote its products. It broadcasts once a day, and pays a total of RMB 2,688 for two consecutive weeks. How much is the average per second?
某公司在电视台黄金时间播报一条30秒的广告，宣传自己的产品，每天播出一次，连播两个星期共付人民币2688元，平均每秒多少元？
<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">2_688 / 14 / 30</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>