Xiao Ming's family lives on the third floor, and there are 36 stairs to walk. How many stairs does he need to walk from the first floor to the fifth floor?
小明家住在三楼，要走36个楼梯，他从一楼上到五楼要走多少个楼梯．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

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

<result>72</result>