If it takes 6 minutes to saw a piece of wood into 3 pieces, how many minutes will it take to saw it into 9 pieces?
一根木头锯成3段要花6分钟，锯成9段要花多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<result>24</result>