If it takes 9 minutes to saw a piece of wood into 4 sections, how many minutes will it take to saw 5 such pieces of wood into 6 sections at the same speed?
如果把一根木料锯成4段要用9分钟，那么用同样的速度把5根这样的木料都锯成6段，要用多少分钟？
<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 * 5</gadget>
<output>75</output>

<result>75</result>