If it takes 6 minutes to cut a log into 3 pieces with a chainsaw, how many minutes will it take to cut it into 9 pieces?
用电锯把一根圆木锯成三段需要6分钟，锯成9段需要多少分钟．
<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

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

<result>24</result>