If it takes 3 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段需要3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">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">8 * (3/2)</gadget>
<output>12</output>

<result>12</result>