Mr. Li's watch is 5 seconds slower in 8 hours. According to this calculation, how many seconds slower in one day and night?
李老师的手表8小时慢5秒，照这样计算，一昼夜共慢多少秒？
<gadget id="calculator">24 / 8</gadget>
<output>3</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<result>15</result>