A piece of wood with a length of 2 meters is now to be sawed into 5 sections. It takes 3 minutes to saw each section, and rest for 2 minutes after sawing a section. How many minutes will it take to saw all of them? Answer: How many minutes will it take to finish all sawing.
一根长2米的木料，现在要把它锯成5段，每锯一次要用3分钟，锯完一段后休息2分钟，全部锯完共要多少分钟？答：全部锯完共要多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

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

<gadget id="calculator">5 - 1 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<result>18</result>