If it takes 12 minutes to saw one piece of wood into 4 pieces, how many minutes will it take to saw another piece of wood into 8 pieces?
一根木料锯成4段用12分钟，另一根锯成8段要多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<result>28</result>