If a piece of wood is sawed into 4 sections, the fee is 1.2 yuan. If it is to be sawn into 12 sections, how much is the fee?
一根木料，锯成4段要付费1.2元，如果要锯成12段要付费多少元．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">1.2 / 3</gadget>
<output>0.4</output>

<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">0.4 * 11</gadget>
<output>4.4</output>

<result>4.4</result>