Xiaojun was going to the 12th floor building to find his father, but unfortunately the power went out and the elevator stopped. If it takes 18 seconds to go from the first floor to the third floor, how many seconds will it take to reach the 12th floor at the same speed?
小军要到12层的大楼找爸爸，不巧停电，电梯停开．如从第一层到第三层需要18秒，请问同样的速度到12层，共需要多少秒才能到达．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

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

<gadget id="calculator">9 * 11</gadget>
<output>99</output>

<result>99</result>