The big customs bell rings once at one o'clock and twice at two o'clock... At 6 o'clock, Xiaohong heard the clock ringing for 25 seconds, so how many seconds does it take to ring the bell at 12 o'clock.
海关大钟，一点钟敲一下，二点钟敲二下…6点钟时，小红听到钟共敲了25秒，那么到12点钟时，敲钟的时间需要多少秒．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">5 * 11</gadget>
<output>55</output>

<result>55</result>