A bamboo pole with a length of 18 meters is sawed into small pieces with a length of 3 meters. If it takes 2 minutes to saw once, how many minutes will it take to complete the sawing?
把一根长18米的竹竿锯成3米长的小段，如果锯一次需要2分钟，锯完一共需要多少分钟．
<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>