If a piece of wood is sawed into 3 sections, the sawing fee is 12 yuan; if it is to be sawed into 9 sections, how much is the sawing fee.
一根木头锯成3段要付锯板费12元；若要锯成9段，则要付锯板费多少元．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

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

<gadget id="calculator">6 * 8</gadget>
<output>48</output>

<result>48</result>