A piece of wood is cut into 3 sections in 2 minutes. If each section takes the same time, how many minutes will it take to cut 5 sections?
有一根木材，2分钟截成3段，如果每截一次所用的时间相同，那么要截5段，一共需要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<result>4</result>