A piece of wood is sawn into 6 sections. If it takes 3 minutes to saw once, how many minutes will the saw be finished?
一根木料被锯成6段，如果锯一次需要3分钟，那么多少分钟锯完．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

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

<result>15</result>