If it takes 6 minutes to saw a piece of wood into 4 sections, how many minutes will it take to saw it into 7 sections?
把一根木料锯成4段要6分钟，锯成7段要多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<result>12</result>