If it takes 2 minutes to cut a piece of wood, how many minutes will it take to saw the piece of wood into 4 pieces?
把一根木头锯断要2分钟，把这根木头锯成4段要多少分钟．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>