It took 2 seconds for the elevator to go from the first floor to the second floor. How many seconds does it take Xiao Ming to take the elevator from the first floor to the 15th floor?
电梯从一楼到二楼用了2秒，小明从一楼乘电梯直接到15楼要多少秒秒．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">2 * 14</gadget>
<output>28</output>

<result>28</result>