A company inserts a 20-second advertisement in the prime time of a local TV station to promote its products. It is broadcast once a day. In March, a total of RMB 868,000 is paid for the continuous broadcast. How much is the average per second?
某公司在一家地方电视台黄金档插播一条20秒的广告，宣传自己的产品，每天播出一次，3月份连播共付人民币86.8万元，平均每秒多少元？
<gadget id="calculator">86.8 * 10_000</gadget>
<output>868_000</output>

<gadget id="calculator">31 * 20</gadget>
<output>620</output>

<gadget id="calculator">868_000 / 620</gadget>
<output>1_400</output>

<result>1_400</result>