A 10-meter-long piece of wood is divided into 3 sections on average and it takes 4 minutes to saw each section. How many minutes will it take to finish sawing?
一根10米长的木头，要平均分成3段每锯一段需要4分钟，锯完一共要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<result>8</result>