It takes Xiao Ming 36 seconds to go from the first floor to the third floor. According to this calculation, how many seconds does it take him to go from the first floor to the fifth floor.
小明从一楼上到三楼用36秒，照这样计算，他从一楼上到五楼要用多少秒．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">18 * 4</gadget>
<output>72</output>

<result>72</result>