It took Master Li 12 minutes to saw a piece of wood into 4 sections. How many minutes would it take to saw this piece of wood into 7 sections?
李师傅把一根木材锯成4段，用了12分钟，如果把这根木材锯成7段，需要多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<result>24</result>