Xiaohong has climbed 18 steps from the first floor to the third floor. How many steps does she need to climb in total to return to her home on the seventh floor?
小红从一楼到三楼上了18个台阶，她要回到七楼的家里，一共需要上多少个台阶？
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<result>54</result>