It takes Xiao Ming 18 seconds to go from the 1st floor to the 3rd floor, so how many seconds does it take him to go from the 1st floor to the 6th floor?
小明从1楼上到3楼需要18秒，那么他从1楼上到6楼需要多少秒．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>