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 10 sections at the same speed?
如果把一根木头锯成4段要12分钟，那么用同样的速度把这根木头锯成10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">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">4 * 9</gadget>
<output>36</output>

<result>36</result>