The TV station inserts a 10-second advertisement, broadcasts it once a day, and broadcasts it continuously for three weeks. The total payment is RMB 136,500. How much is the average per second?
电视台插播10秒广告，每天播出一次，连播三周，共付人民币啊13.65万元，平均每秒要多少万元？
<gadget id="calculator">10 * 7 * 3</gadget>
<output>210</output>

<gadget id="calculator">13.65 / 210</gadget>
<output>0.065</output>

<result>0.065</result>