It takes 12 minutes to cut a piece of wood into 4 sections. How many minutes will it take to cut the same piece of wood into 9 sections at this speed?
把一根木头截成4段用12分钟，照这速度，把同样的木料截成9段，要用多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<result>32</result>