It takes 3.6 minutes to saw a piece of wood into 3 sections, and how many minutes to saw it into 8 sections.
把一根木料锯成3段要3.6分钟，锯成8段要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">3.6 / 2</gadget>
<output>1.8</output>

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

<gadget id="calculator">1.8 * 7</gadget>
<output>12.6</output>

<result>12.6</result>