A building is 25 stories high, and there are 17 steps on the two adjacent floors. How many steps does Beibei need to walk from the 1st floor to the 18th floor?
一幢楼房有25层高，相邻两层有17级台阶，贝贝从1层到18层，要走多少级台阶？
<gadget id="calculator">18 - 1</gadget>
<output>17</output>

<gadget id="calculator">17 * 17</gadget>
<output>289</output>

<result>289</result>