A piece of wood needs to be sawed into 5 sections. If it takes 2 minutes to cut one piece, how many minutes will it take to finish sawing the piece?
一根木条，要把它锯成5段，如果锯开一处要用2分钟，锯完这根木条一共用多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>