There is a thin steel pipe divided into 5 equal sections. Each section should be painted with red and white colors respectively. How many different ways of painting are there? (Two coloring methods that are the same after inversion are regarded as the same method)
有一根划分成相等5段的细钢管，要用红、白两种颜色分别对每一段进行涂色，共有多少种不同的涂色方法．(经过倒置后相同的两种涂色方法，视为同一种方法)
<gadget id="calculator">32 - 8</gadget>
<output>24</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">8 + 12</gadget>
<output>20</output>

<result>20</result>