It takes 9 minutes to saw a piece of wood into 4 sections, so how many minutes will it take to saw this piece of wood into 6 sections at the same speed?
把一根木料锯成4段需要9分钟，那么用同样的速度把这根木料锯成6段，需要多少分？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<result>15</result>