master carpenter wants to saw a 12-meter-long wooden strip into 2-meter-long small wooden strips. If it takes 3 minutes to saw each section, how many minutes will it take to saw this wooden strip?
木工师傅要把一根12米长的木条锯成2米长的小木条，如果每锯一段要3分钟，把这根木条锯完需要多少分钟．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

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

<result>15</result>