A big clock strikes 5 times at 5 o'clock in the morning, and it takes 8 seconds to complete it. According to this calculation, if it strikes 10 times at 10 o'clock, how many seconds will it finish?
一面大钟早上5点敲5下，用8秒完成，照这样计算，10时敲10下，几秒敲完？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<result>18</result>