It takes Xiaolin 18 seconds to go from the first floor to the second floor. According to this calculation, how many seconds does it take him to go from the first floor to the seventh floor?
小林从一楼到二楼需要18秒钟，照这样计算，他从一楼到七楼需要多少秒钟．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">18 / 1</gadget>
<output>18</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">18 * 6</gadget>
<output>108</output>

<result>108</result>