Uncle Li went to work on the sixth floor of the ten-story building. Unfortunately, there was a power outage and the elevator stopped. If it takes 36 seconds to go from the first floor to the third floor, how many seconds will it take to go up to the sixth floor at the same speed?
李叔叔到十层高的大楼的第六层办事，不巧停电，电梯停开．如果从一层走到三层要36秒，那么以同样的速度往上走到第六层，还需要多少秒才能到达．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>