Xiao Ming wants to climb 20 steps, and each step climbs 2 or 3 steps. How many different climbing methods are there?
小明要登20级台阶，每步登2级或3级台阶，共有多少种不同登法？
<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">1 + 7 + 70 + 36</gadget>
<output>114</output>

<result>114</result>