A piece of wood is 24 decimeters long, and it needs to be sawed into sticks of 4 decimeters, each sawing takes 3 minutes, and a section of rest is 2 minutes after sawing, how many minutes is needed to saw all the pieces.
一根木头长24分米，要锯成4分米长的木棍，每锯一次要3分，锯完一段休息2分，全部锯完需要多少分．
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">15 + 8</gadget>
<output>23</output>

<result>23</result>