It takes 20 minutes to saw a piece of wood into five sections. If it is sawed into six sections, how much time should it take?
锯一根木条，锯成五段用了20分，如果锯成六段，应该用多少时间？
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>