It takes 12 minutes to saw a piece of wood into 4 pieces, how many minutes does it take to saw it into 6 pieces?
把一根木头锯成4段要12分钟，锯成6段要多少分．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<result>20</result>