A piece of wood needs to be divided into 6 sections on average. It takes 5 minutes to saw each section. How many minutes will it take to finish sawing.
一根木头，要把它平均分成6段，每锯下一段要5分钟，锯完一共要多少分钟．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>