There are 20 steps from the first floor to the second floor of the puzzle teaching building. How many steps does Xiaopei have to walk from the first floor of the teaching building to the third grade classroom on the fourth floor in the morning?
从益智教学楼的一楼到二楼有20级台阶，小佩早上从教学楼的一楼到四楼三年级教室上课，她要走多少级台阶？
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>