The Ankang Municipal Party Committee Building has 9 steps. If it is stipulated that when going up the stairs, only one or two steps can be climbed at a time, how many different ways are there from the ground to the top?
安康市委大楼有9级的台阶，如果规定上楼梯时，每次只能跨上一个台阶或两个台阶，那么从地面到最上层共有多少种不同的跨法？
<gadget id="calculator">1 * 8</gadget>
<output>8</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<gadget id="calculator">4 / 3 / 2 / 1</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 * 5 * (2/3)</gadget>
<output>20</output>

<gadget id="calculator">8 + 21 + 20 + 5 + 1</gadget>
<output>55</output>

<result>55</result>