Zhang Liang's room is on the 18th floor of the hotel. It takes 34 seconds to take the elevator from the first floor to his floor. Li Lin lives on the 31st floor. How many seconds does it take to take the elevator from Zhang Liang's floor to the 31st floor?
张亮的房间在宾馆第18层，从第1层乘电梯到他所住的楼层要34秒，李林住在31层，从张亮所住的楼层乘电梯到31层要用多少秒．
<gadget id="calculator">18 - 1</gadget>
<output>17</output>

<gadget id="calculator">34 / 17</gadget>
<output>2</output>

<gadget id="calculator">31 - 18</gadget>
<output>13</output>

<gadget id="calculator">2 * 13</gadget>
<output>26</output>

<result>26</result>