The wall clock strikes 6 times at 6 o'clock, and it takes 10 seconds to strike, so how many seconds does it take to strike 9 times at 9 o'clock? How many
挂钟6点钟敲6下，10秒敲完，那么9点钟敲9下，几秒敲完？多少
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">2 * 8</gadget>
<output>16</output>

<result>16</result>