It takes 6 minutes to saw 4 sections of a piece of wood, how many minutes will it take to saw 5 sections?
一段木料，锯4段需6分钟，如果锯5段需多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

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

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<result>8</result>