company inserts a 30-second advertisement in the prime time of the TV station, and broadcasts it once a day. The advertising fee for two consecutive weeks is 35.7 yuan. How much is the average advertising fee per second?
某公司在电视台黄金时间插播一条30秒的广告，每天播出一次，连续播两周播放广告费35.7元，平均每秒付广告费多少元？
<gadget id="calculator">30 * 14</gadget>
<output>420</output>

<gadget id="calculator">357_000 / 420</gadget>
<output>850</output>

<result>850</result>