A piece of wood is 18 meters long. Now it is sawn into logs with a length of 3 meters each. It takes 2 minutes to cut each part. How many minutes will it take to saw all the pieces?
一根木头长18米，现把它锯成每段长3米的圆木，每锯开一处要2分钟，全部锯完需要多少分钟？
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

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

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>