If it takes 6 minutes to saw a piece of wood of uniform thickness into 3 sections, how many minutes will it take to saw it into 4 sections?
把一根粗细均匀的木料锯成3段要6分钟，如果锯成4段要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>