A piece of wood with uniform thickness is 30 decimeters long, and it needs to be sawed into 5 decimeters long wooden sticks. It takes 3 minutes to saw each time and rest for 1 minute after sawing a section. How many minutes will it take to saw all the pieces?
一根粗细均匀的木头长30分米，要锯成5分米长的木棍，每锯一次要3分钟，锯完一段休息1分钟，全部锯完要用多少分钟？
<gadget id="calculator">30 / 5</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">1 * 4</gadget>
<output>4</output>

<gadget id="calculator">15 + 4</gadget>
<output>19</output>

<result>19</result>