The alarm clock at Liu Xin’s house rings on the hour. It takes 5 seconds to strike 6 times at 6 o’clock in the morning, and 8 seconds to strike it at 9 o’clock in the morning.
刘鑫家的闹钟到了整点就敲响，早晨六点敲6下用了5秒，九点时敲完用了8秒，那么到深夜二十四点时敲完要用多少秒．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">5 / 5</gadget>
<output>1</output>

<gadget id="calculator">24 - 1</gadget>
<output>23</output>

<gadget id="calculator">1 * 23</gadget>
<output>23</output>

<result>23</result>