If it takes 12 minutes to saw a piece of wood into 4 sections, how many minutes will it take to saw the same piece of wood into 7 sections?
把一根据木料锯成4段用12分钟，把同样一根木料锯成7段用多少分钟．
<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>