log 40 meters long is sawed into 5 sections. It takes 6 minutes to saw each section, how many minutes will it take to complete the saw.
把一根长40米的木头锯成5段．每锯一段需要6分钟，锯完一共需花多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<result>24</result>