If it takes 12 minutes to saw a piece of wood into 4 sections, how many minutes will it take to saw it into 6 sections?
一根木料锯成4段用12分钟，如果锯成6段需要用多少分钟．
<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<gadget id="calculator">72 - 12</gadget>
<output>60</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<result>20</result>