Little Naughty takes the descending escalator downstairs. If he goes down step by step, he needs to walk 36 steps from the upper end of the escalator to the lower end. If the little naughty walks from the lower end to the upper end along the original escalator (it's very dangerous, don't follow suit!), you need to walk 60 steps at 5 times the speed of going downstairs to reach the upper end. How many steps does this escalator have when it is standing still?
小淘气乘正在下降的自动扶梯下楼，如果他一级一级的走下去，从扶梯的上端走到下端需要走36级．如果小淘气沿原自动扶梯从下端走到上端(很危险哦，不要效仿！)，需要用下楼时5倍的速度走60级才能走到上端．请问这个自动扶梯在静止不动时有多少级．
<gadget id="calculator">36 / 3</gadget>
<output>12</output>

<gadget id="calculator">60 + 12</gadget>
<output>72</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">72 / (4/3)</gadget>
<output>54</output>

<result>54</result>