It takes 3.6 minutes to saw a piece of wood into 3 sections, how many minutes will it take to saw it into 5 sections?
把一根木料锯成3段要3.6分钟，锯成5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">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1.8 * 4</gadget>
<output>7.2</output>

<result>7.2</result>