A piece of wood is 8 meters long, and it must be sawed into sections of 2 meters. It takes 5 minutes to saw each section, how many minutes will it take to finish sawing?
一根木头长8米，要把它锯成每2米一段．每锯一段需要5分钟，锯完一共要花多少分钟？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<result>15</result>