A piece of wood is 36 meters long, and it is sawn into a section 6 meters long. It takes 4 minutes to saw each section, how many minutes are used.
一根木料长36米，把它锯成6米长的一段．每锯一段要用4分钟，共用多少分钟．
<gadget id="calculator">36 / 6</gadget>
<output>6</output>

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

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<result>20</result>