If it takes 6 minutes to saw a piece of wood into 3 pieces, how many minutes will it take to saw it into 5 pieces?
把一根木头锯成三段要用6分钟，如果锯成5段要用多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

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

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>