It takes 12 points to saw a piece of wood into 4 sections. According to this calculation, how many points are needed to saw it into 8 sections?
一根木料锯成4段要12分，照这样计算，锯成8段一共需要多少分．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<result>28</result>